I am at a loss here...the movement has the number 853 under the balance, but I cannot find any reference to it on the interwebs. It needs a new balance staff and roller jewel. Any info would be greatly appreciated!
Base caliber is an ETA 853. I can't find much else on it. Ranfft shows parts as follows: Balance staff U906 Stem W1402 Mainspring Zf1534, 1.80 x 13.5 x 0.17mm Hands 1.38 x 0.80mm From my Paulsons reference.
Dang I searched “eta 853” too on the database and no dice. http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&ETA_853 Should have googled eta 853.... doh!