Quoting from AJTT, the first Omega wristwatch (in 1900) was a Cal.12 ligne (lépine, with no sub-second hand). There follow (in AJTT) two watches without sub-seconds (Cal.15 ligne for men, Cal.12 ligne for ladies – both lépine) – both were ‘left-handers’ (crown at 9 o’clock).
Below is a French advertisement from 1911 (from Kirby Beard). Advertised specifically for men is a wristwatch, either Cal. 12 or 13 ligne – without sub-second hand. Of note, ALL the watches shown in the advertisement (for men and for ladies) are ‘left-handed’!
It would seem that all the dials of the above watches were enamel.
The period covered by the above watches was ‘early days’ – anything and everything happened. The watch shown by Mr.Watch would appear to date about 10 years later (with a more daring, avante-garde dial) and furthermore was probably after WWI (when watches did develop) – but maybe it was a leftover?
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