Yes, the Tissot CH27 based chronographs have both the Lemania serial and the Tissot serial. From 1942-1944, Tissot placed their serial on the inside caseback. By 1945, Tissot had switched over to a case reference system and placed their serial on the bridge as you show above.
The Lemania #396 shown above is also from 1942 according to the Tissot caseback serial.
T TnbenderI鈥檓 trying to get an accurate date
T TnbenderHello! I鈥檓 trying to get an accurate date on my 27cal chrono.
The absence of shock absorber and the type of the minute counter spring dates the movement at most to 1944-45.
However, the picture is not properly focused. Should the balance wheel be cut, as it would seem, the movement can be dated to 1942-1943.
Circa 1950 ref 2279-3 cal 321
The movement pix and one showing the original brushing/sharp lug are prior to COA.
12976485
Than is this a 18 chro , right ?
