The movements are definitively identified as Eterna by their keyless mechanism, but their top plates are different from those shown in Jobin. Compare the bridge shapes shown in Jobin for the Eterna movements and those seen on Stauffer branded Eterna movements. To see a clear example of this look at the section below about Eterna movements customised for Stauffer & Co. Fabrique Horlogerie Fontainemelon (FHF) was a large manufacturer of Swiss ébauches who did this a lot. Some manufacturers produced many different movements with the same basic layout and identical train and keyless mechanism components, but with different patterns of cocks and bridges.
The shape of the cocks and bridges is more of an aesthetic consideration so long as all the pivot holes and screw holes are in the same places, then bridges of very different shapes can be freely interchanged. Note that the setting lever screw is an exception to the rule about screw placement, it can be in different places in stem set and pin set varieties of the same movement, or absent altogether if the keyless mechanism is negative set.
If the cover plate does not include the setting lever detent spring, it is unlikely that the movement will be listed in one of the catalogues. Catalogues of movements such as Bestfit generally only include movements made from the 1930s onwards, and usually require the movement size and the shape of the keyless mechanism cover plate.
Manufacturers altered the appearance of their movements by changing the top plates, but the basic layout remained much the same.Īnonymous Swiss ébauches (movements) made before the 1930s are not at all well documented. In fact, the apparently huge variety of Swiss watches is explained by this phenomenon: once the basic layout in a round movement of the barrel, train wheels, escapement and balance was arrived at, there was little scope, let alone need, to change it. Although some movements leap out to the experienced eye, other are less easy because of similarities between the products of different manufactures, and manufacturers altering bridge shapes for different customers. It is often difficult to identify movements from the shape of the top plates or bridges alone. If you have the movement serviced, cleaned and oiled, which all movements need every few years, ask for both sides of the bottom plate to be photographed. There might be a manufacturer's trademark concealed on the bottom plate under the dial, or even under one of the cocks or bridges mounted on the bottom plate as in this Mystery Movement. Unfortunately, if I don't recognise one I don't have the time to plough through catalogues trying to identify one unless it is something unusual or interesting. There are thousands of different movements, many of which look very similar. It doesn't have any modern (post-WW2) watches, or electrical, battery or quartz watches. This page is to identify some unidentified movements found in the type of watches that I collect, which are principally Great War era men's wristwatches with 12 or 13 ligne movements. The page doesn't show movements with maker's names on them, because they are already identified. It is a small selection of often unidentified old movements that I have been able to positively identify. Please note that his page is not intended to be a comprehensive reference of watch movements, of which there are hundreds, possibly thousands. Bocks and Rams: IWC and Stauffer Trademarks.New product: Leather and Sterling Alberts.Savonnette and Lépine Watches and Cases.Bears Galore! Three Bears and 0♹35 Silver.Borgel 2: Taubert & Fils and Taubert Frères.Borgel 1: François Borgel and Louisa Borgel.Straps for Vintage Fixed Wire Lug Trench Watches or Officer's Wristwatches
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