Seeking Expert Opinion on Tissot 15TL (Caliber 33.3, 37mm Case) - Dial and Overall Authenticity

Hello everyone,

I recently acquired a vintage Tissot 15TL with a 37mm case and a Caliber 33.3 movement. I am seeking advice from experts on this forum regarding the overall authenticity and originality of the watch, particularly the dial.

Based on the attached photos, could you share your thoughts on:

Whether the dial appears original or has been refinished/restored?

Any signs that might indicate replaced or non-original parts?

General insights into this specific model and its historical value?


Any input or references to similar models would be greatly appreciated. Thank you in advance for your expertise!

(Attached are detailed photos of the watch, including the movement and case back.)

Hi Anta. Your chronograph looks pretty original to me. It shows the passing of years (from 40's, I think) and the triple circle at center, providing different measures: tachymeter, pulsations for the doctor with the innermost two circles. The case is standard for this movement, with those beautiful oval buttons closer to 3 than the more usual 2,4. The case is well preserved, but perhaps some polishing will do good. The movement 15TL in one of several climaxes of Lemania, next to 2310/CH27, 1873 and the ugly but highly anti-evertything, 5100. A service for the calibre is in order. I find disagreement among collectors on what should be done to the dial: one part appreciates originality (i.e., let it as is now), other favors restored dials. If you are interested, I know a lady in Uruguay who makes precisely this. Her promise is "I can copy and restore any dial design". 33.3 is the name used by Omega for this caliber: mechanically the same, but with a more flamboyant name and beveled bridge and other parts. Just as "Lemania 15TL", is the name given by the factory, as used by a number of makers, among them, Tissot.
As you can see at the attached photos, I possess another exemplar: same brand, same engine. I like the name Tissot written this way, kind of italics with a hat.
Enjoy your chronograph. You have a real gem on your hands.