but with 2 pushers; in all caliber-recognition books the caliber 210 is shown as monopusher, and the newer caliber 215 with 2-pushers; but these movements are some sort of transitional model, easily recognized by the drilled through holes for the 2 locating pins in the balance cock.
They are unusual but not really very rare, these movements can be also found in chrono's with Revue or Phigied on the dial.
Pic of a similar movement on the bench:
and the marking "210" on the mainplate:
note the very weird construction, the mainplate is build in seperate "layers".
Addition: a chrono with a hinged-back case as the one in your pic, also a Angelus caliber 210, but with only 1 pusher:
Hope this helps a bit,
Paul
This message has been edited by Paul K on 2009-05-06 23:55:11