Very true, except it isn't quite (a 321). This uses the Lemania 1281, which is an intermediate development of the Lemania CH27 C12, before it got to be the 2310 (or 321).
Tissot and Lemania were the only ones to use this intermediate stage, Omega skipped directly from the earlier one to the later one.
This Tissot has exactly the same movement as my BBC Lemania Chrono
Dave