This is one of the better looking tuning fork Omega Constellation packages. It has a beautiful silvered two tone dial with applied hour markers. At 12, there is a prominent red framing of the Omega logo. All the luminescent material is intact, and the hands are just perfect, the seconds hand matching the red hour marker at 12. The Omega movement in the f300hz series watches was licensed from Bulova & ESA. Patent D2Y2, and base is stamped ESA 916, the Omega caliber being 1250. The Omega serial number is 34832634. Case manufacturer is CB. Omega case reference number is 198.0006. This model uses a Renata 344 battery, have a slightly larger 36mm case diameter than the earlier Constellations and dates from ca. 1972. The original and comfortable Omega bracelet has reference number 1192/192 and has 13 links ( a couple of them have dents though). It will fit a wrist up to ca 18,5 cm.