A simple sidereal Nero 30 minute stopwatch with a quality movement by Lemania, still working perfectly today.


Stop watches are difficult to date, as the movements were often in production for decades. This example looks to be from the mid fifties, and the serial number starts 54 which may or may not be a clue. The same movement is in this c1939 stopwatch but by this later Lemania Nero the Sidereal stop/go function had all been incorporated in the crown.


Lemania are best known for their chronograph movements, and were Heuer’s largest rival in that market (and remember stopwatches were used in various sorts of businesses, schools and by the military all the time back then). In 1932 the company joined Tissot and Omega to form SIHH, and the most famous Lemania movements will be found in the Speedmaster watches. But this is a simpler stopwatch, and doesn’t have the Omega moniker, so the price is very reasonable.

The case back is nice and tight, including the dust cover, but the chrome shows appropriate wear on the case back for the age. The functions are all working perfectly, which are shown on the video. The bow is still the perfect tightness, so this stopwatch may not have had a hard life.

This watch will be supplied with a basic presentation box and our Certificate of Authenticity.

Please see the HD video for more detail. All photos and videos are part of the description and are of the actual watch unless mentioned. We do not photoshop any pictures, and the images are copyright of birthyearwatches.com and should not be used without permission.


Width with crown 64.5 mm (excluding bow)

Width without crown 49.8 mm

Case Thickness 16.4 mm

All sizes are approximate.

Included with this watch is a 1 month guarantee and free delivery to UK addresses. If you live outside the UK we can still deliver to most countries. Please see our Worldwide Shipping information, or Contact Us. Payment can be made by most credit or debit cards, bank transfer or PayPal.

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