Let's see those tiny vintage watches!

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I'd never wear one, of course, but apparently some people have no shame... 😁

 
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This 1941 Aquasport in a steel waterproof case measures 23.5mm across:


and this 1938 Camping model, also in a steel waterproof case, measures 29.5mm in diameter:
 
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This is a family piece, know as "Uncle Joe's War watch". Worn by an Aussie soldier during WW2.

Almost a huge 26mm!

 
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I have an unfair advantage. Shamelessly double posting as I’ve just been wearing this pretty much on a daily basis.
 
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31mm

30mm

32mm

29mm (yes, Men’s formal watch)

31mm
28.5mm

29mm, 28mm, 29mm

The bund style help them wear a bit larger
 
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I suppose that these three Hamiltons would be considered small. The Piping Rocks are 1 1/8" (28.575mm) across and 1 5/8" (41.275mm) from lug to lug, while the Turner is 7/8" (22.225mm) across and 1 3/8" (34.925mm) from lug to lug.
Edited:
 
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I suppose that these three Hamiltons would be considered small. The Piping Rocks are 1 1/8" across and 1 5/8" from lug to lug, while the Turner is 7/8" across and 1 3/8" from lug to lug.
Holy shit! This is stunning!
 
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My smallest watch is from watchmaking school of St. Imier with handfinished movement. 😀
 
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I no longer have this circa 1930s Patek Philippe as it was just too small, 26mm length, on my wrist. I bought the watch back in the late 1980s from a private party who offered it for sale for a very fair price and I loved the dial. I kept the watch for almost 20 years but then sold it with a few others to buy another watch of more suitable size.

 
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My smallest, aside for the 1960s vintage ones I’ve bought for my better half.



1940s vintage Rolex chronometer, manual wind 8 adjustments



Late 1940s, early 1950s Mido Multifort, bumper automatic. This would be a “boy’s” sized watch today. The octagonal case is 28mm from the 3 to the 9. Looks awful on my big wrist.