Rare and original 34mm 18k Omega Seamaster Chronometre ref. 2577/2520 SC with cal. 352 movement. 12,33x.xxx serial dates the watch to 1950, and the case back has one service mark. Overall, the watch is in wonderful vintage condition with a great patina on the dial, and a nice finish on the case. The movement runs well and keeps good time, but power reserve is not strong. The only flaws on the case are a few small dings in the case back. Crystal does not have Omega symbol. I would rate the watch at 88%+ because of the patina on the dial and the case back. Asking $1500 OBRO shipped in the CONUS. Please feel free to email [email protected] or call/text Matt at 202.531.4343.