Older Omega Education

You guys have some awesome newer Omegas here. I’m usually an amazing antique archeologist, but the nuance of watches and jewelry gets me stumped. The movement serial puts this around late 1960’s but the paperwork and presentation date isn’t until 1973. I’m 96% the body of the watch says 14 ct gold which is weird because I would expect 14k gold (the ct throws me off) The Speigel band seems aftermarket (it says 10k GF Topcase) but I’ve seen other Seamasters with the exact same band. This was presented to my grandpa after a lifetime of working at New York Life Insurance. I’m surprised Omega allowed “NYLIC” right on the face. The case is this hard plastic box which I don’t see on any other Seamasters from this period. I took this thing off the shelf after 30 years and the second hand just started moving again. I wound it 15 times and set the time. It is keeping pace exactly with my iPhone after 4 days. Crazy. Any info yall have would be great.

Company may have bought a few or old stock still sitting for some employees nearing the presentation times

Companies have the info printed on the dial. Not Omega