Omega case reference 145.007. 41mm sheer joy. This rare Chronostop is in very good condition. 22mm lug width. Omega movement serial number is 26671925. The untouched (?), caliber 865 (Omega by Lemania) runs very well. The mesh Omega bracelet fits this watch very well too (although not original for this model).
The stainless steel “Compressor” case is certified for 120 meter waterdepth.
The chronograph on this watch has a peculiar function: When you stop it, you have to hold the pusher in to read the time elapsed. When you let the pusher go, the chronograph hand returns to 0. Another version of the Seamaster Chronostop (145-008) has an internal “diver” 60 minute bezel operated by a crown on the left side of the case.
Please look at the Omega Technical guide from 1968 (in Swedish) describing the Seamaster and Geneve Chronostop models (to be found among the pictures of this watch).