Transatlantic Chronograph, Lemania LWO 283 (ETA 2892 with Dubuis-Depraz Chrono Module), ca. 1990

An easy way to spot a modular chronograph is
to check whether the buttons are on a higher level then the crown. You can see in above picture that this is the case. Since the chronograph module is on top of the automatic movement on the dial side, the chronograph push buttons are higher and not in line with the crown. An easy way to spot a modular chronograph.

Wow, I think what you have there is a rare Lemania LWO 283 movement!

It was the only movement marketed by Lemania that it did not design. They hired Dubois Depraz to design and build a module that would fit on top of an ETA 2892 and give the same functionality and a similar (but not exactly the same) layout as a Valjoux 7750. Later, they sold the rights to the module back to Dubois Depraz which used it as the basis for future chrono module designs. One of the odd distinguishing features of the LWO283 was that the movement came with the date magnifier already mounted over the date aperture-- it was an integral part of the movement.

I have not found any information on the web yet to confirm this, but will continue to look for a confirmation. Also interesting is the fact that the offset of crown and pushers seems to be more pronounced for the LWO 283 (ETA 2892 plus DD module) then for e.g. a ETA 2824 plus a DD module or the ETA modular chrono 2894. In ca. 2000, ETA started to manufacture their own chronograph modules in order to become independent from Dubuis Depraz. My other LWO 283 chrono is this Bucherer Chronograph.