Greetings. As a newbie to your forum, please allow me to introduce a circa 38 mm Omega pocket watch movement I am restoring for a friend's family. I think it is quite handsome so I made it my picture thing here. The calibre is difficult to ascertain with only a dial side marking of the number 26513 with a Swiss cross above the number. This almost leads one to think it could be an ebauche designator as I believe I have seen this base plate design used with other Swiss manufacturers of the early 20th century. The last four digits of the 578161 serial number are repeated on a few components such as the balance and barrel bridges, and in this case, the
faux single but individual looking three-finger bridge. Would anyone know what Omega officially designated this calibre design as? I have seen this base plate design with a plethora of Omega bridge types on the PWD website which calls it an 1895 production year which I am not sure I agree with. I am considering installing an alloy mainspring but am reticent to open the barrel as it is working well, and, as maybe some you have learned in this hobby, "If it ain't broke, don't fix it. No really."
Thank you kindly for your consideration of a newbie's inquiry in what looks like to be an interesting forum.
Sincerely,
damfuzzy
