VintageWatchstraps Logo

Vintage Watchstraps

Straps for Vintage Fixed Wire Lug Trench Watches or Officer's Wristwatches



Blog: Swiss nine carat gold

Date: 12 January 2016

Copyright © David Boettcher 2006 - 2021 all rights reserved.

I make additions and corrections to this web site frequently, but because they are buried somewhere on one of the pages the changes are not very noticeable, so I decided to create this blog section to highlight new material. Here below you will find part of one of the pages that I have either changed or added to significantly.

I have done a lot of research into the hallmarking of imported watches, but one thing that had eluded me until recently was how the Swiss dealt with nine carat gold. There was a big market for nine carat gold items in the UK after it was made a legal standard in 1854, but it was not a legal standard in Switzerland until 1933, so what did the Swiss watch manufacturers do - miss out on a big chunk of the market in the UK? Not likely! Read on below for the full story . . .

This is from my page about Swiss hallmarking that can be found at Swiss Hallmarks.

If you have any questions or comments, please don't hesitate to contact me via my Contact Me page.


Nine and Twelve Carat Gold

Nine, 12 and 15 carat gold were made legal standards in Britain 1854. These lower standards of gold quickly became very popular because items made from them could legally be called “gold”, and they were cheaper, 9 carat gold in particular was much cheaper, than the only previous legal standards of 22 and 18 carats. Note that it is only legal to call items gold that are made from one of the legal standards. It is illegal to call plated, rolled or filled items gold, although it is frequently done by amateur sellers who don't know this; caveat emptor.

Nine carat gold contains 9 / 24 = 37.5% gold by weight, the rest is varying amounts of silver, copper and other elements to give different colours. The standards of 12 and 15 carat gold were replaced in 1932 by a 14 carat standard.

The Swiss Precious Metals Control Act of 1880 specified two legal standards of fineness for gold, 18 and 14 carat. Most Swiss watches with 18 or 14 carat gold cases imported into Britain after 1880 carry Swiss hallmarks; a small proportion of 18 carat gold Swiss cases were sent to England to be marked with British hallmarks before 1888, but 14 carat cases couldn't be hallmarked in Britain because it was not a legal British standard of fineness.


Mark in Nine Carat Gold Swiss Watch Case

The lack of official Swiss legal recognition for nine and twelve carat gold meant that nine carat gold cases could not be assayed or hallmarked in a Swiss Bureau de Contrôle. This did not stop Swiss watch manufacturers from wanting a share of the large and growing market for watches with cheaper gold cases in Britain, and there was nothing to stop them making cases from one of these standards of gold, but the lack of an official Swiss hallmark was a problem.

Before 1888, nine and twelve carat gold Swiss watch cases could be hallmarked in a British assay office with traditional British hallmarks. This was entirely voluntary and most Swiss watch manufacturers didn't bother. But some did. English watch manufacturers objected to this, so from 1888 onwards new British hallmarks for imported watches with the word "Foreign" across the middle were specified. This effectively put a stop to the practice of getting any gold or silver Swiss watch cases assayed and hallmarked in Britain until 1907. This is discussed further on my page British hallmarking.

This left a problem for Swiss watch manufacturers. The Act which introduced the new hallmarks for foreign watch cases also banned the import of gold and silver watch cases that weren't hallmarked. Watch cases of 18 and 14 carat gold could be hallmarked in Switzerland, and these Swiss hallmarks were allowed by the British Customs authorities. But 9 and 12 carat gold cases could not be hallmarked in Switzerland, so from 1888 Swiss watch case manufacturers simply applied their own official looking marks to 9 and 12 carat gold watch cases.

The picture here shows a crown stamp on the inside case back of a Swiss ladies' cocktail watch. The case has stamped on the underside of both the fixed lugs a "9" on its side followed by "375", do it is clearly 9 carat gold. The crown mark in the image is stamped twice inside the case back. These are not official British or Swiss hallmarks, they are marks that the case maker has put onto the case that look sufficiently official that British customs and customers in Britain would be convinced that the case was in fact 9 carat gold.

1918 Decree

In December 1918 a Swiss Federal Decree brought several aspects of Swiss hallmarking of gold and silver watch cases destined for Britain into line with British practice. The documentation submitting the cases to a Bureau de Contrôle for hallmarking had to declare that the cases were for export to Britain.

Gold watch cases of 18 carat fineness continued to be marked with the head of Helvetia as before, but watch cases marked with the British legal fineness of 15 carat could be marked with a squirrel hallmark. Since 15 carat was finer than the 14 carat usually signified by the squirrel this was no problem, but cases submitted for hallmarking that were marked 15 carats had to assay at this fineness before the squirrel hallmark could be applied.

Something completely new that was introduced by the decree was that gold cases of 9 and 12 carat could be tested and hallmarked with the Swiss Federal Cross Swiss Federal Cross in Swiss Bureaux de Contrôle. The Decree stipulated that the fineness of 9 or 12 carat must be marked on the case, but it did not specify the form of these marks.

As a consequence of the 1918 Decree it was recommended that Swiss watch case manufacturers use the mark “0,925” rather than 0,935, the former corresponding to the English fineness of Sterling 0·925, and that a single punch of the bear hallmark be used instead of the three bears used until that date.

However, since 1907, gold and silver watch cases imported into Britain had to be assayed and hallmarked in a British assay office, so the need for this Decree is difficult to understand. Most Swiss gold and silver watch cases imported after 1 June 1907 have only British import hallmarks. Watch cases intended for retail with only Swiss hallmarks would not be passed by the customs so could not be imported, although someone buying a watch on the continent was permitted to bring it into the country as a personal import.

Export Hallmark 1924

In 1924 the Swiss Federal Council received to a request by the Association of Swiss gold watch case manufacturers to permit gold watch cases to be assayed and hallmarked if they were to be exported to countries where gold fineness standards below 14 carat were legal. This was a request to extend the provisions of the 1918 decree, which only applied to watch cases destined for Britain, to other countries.


1924 Eidgenössisches Kreuz Hallmark

It was noted in the request that in several countries, such as Great Britain, gold fineness levels below 14 carats were legal and could be hallmarked. For Britain, these were the gold standards of fineness of 12 carat = 0·500 and 9 carat = 0·375. It was remarked that “Watches with cases in these gold fineness find considerable sales in England.”

In response to this request, on 31 March 1924, the Federal Council decreed that from 1 May 1924 gold watch cases of below the legal fineness of 14 carats, but not less than 8 carats, could be assayed and hallmarked with the “Eidgenössisches Kreuz” or Swiss Federal Cross Swiss Federal Cross in an official Swiss Bureau de Contrôle (assay office) as a guarantee of the stated fineness at the request of the producer.

This Decree didn't alter the legal standards of fineness for gold in Switzerland, but it meant that the Swiss Bureaux de Contrôle could test and hallmark items of below 14 carat fineness, but not less than 8 carats, providing that they were to be exported.

It was decreed that the fineness should be marked either in parts per thousand such as 0.375 or carats such as "9 C". The case manufacturer stamped the fineness mark and the Bureau de Contrôle counter stamped the Federal cross after confirming the fineness by assay.


Borgel 9 carat gold watchcase
Image courtesy of and © Bill Whiteley

The photograph here shows a nine carat gold Borgel watch case with an example of these Swiss hallmarks.

One interesting feature of this case is the little dot right in the centre of the case that looks like a punch mark. This has been made by the watch movement centre pivot. The cost of gold compared to other metals was, and still is, very high, the average gold/silver price ratio during the 20th century was 47:1 meaning that gold was nearly 50 times as expensive as silver. Because of this, gold cases were made as thin as possible, thinner than silver cases, to keep the cost down. This watch case has been made so thin that the back of the case can flex inwards and press onto the end of the centre pivot, which has left the mark in the case. Needless to say, this is not ideal for good timekeeping!

Bill Whiteley kindly measured the thickness of his 9 carat gold Borgel case for me, the back of the case is 0.28mm thick. This corresponds very well with the definition of Poinçon de Maître No. 5, the Key of Geneva, which was used on gold and platinum watch cases of minimum thickness 0.3mm made in Geneva. I am sure that a bit of polishing over the years could have reduced it by .02mm. For comparison I measured a couple of sterling silver Borgel cases of similar age and they were 0.58 and 0.56mm thick; this thickness makes a much more substantial case, but in gold would push up the cost considerably.

This is one of the points that English watchmakers and watchcase makers raised with the Select Committee on hallmarking in 1878, that English watchcases had to be made thick enough to withstand the British hallmark punches, whereas Swiss watch cases that were not required to be hallmarked could be made thinner, and therefore cheaper. I haven't yet measured a 9 carat gold Swiss case with British import hallmarks to see if that was made thicker to withstand British hallmarking, but I suspect that they weren't and that the assay offices were simply more careful in their application of the punches.

The Swiss authorities officially recognised nine carat gold as a legal standard in Switzerland in the Precious Metals Control Act of 1933, but only for watch cases. The hallmark for nine carat gold was a "morgenstern", which literally means morning start but is a medieval weapon like a mace consisting of a baton with a spiked metal ball on the end.

If you have any questions or comments, please don't hesitate to to get in touch via my Contact Me page.


Copyright © David Boettcher 2006 - 2021 all rights reserved. This page updated June 2018. W3CMVS. Back to the top of the page.