Hi, I'm a diver and I'm interested in getting a similar theme watch. I saw this on sale. It looks lovely but I'm wondering whether it is original? I did notice at the back it did not have Made in Japan; not it did carry the "Scuba Diver" imprint like other watches. The seller wants US$160...

I am aware that the 6306 models were JDM (Japan Domestic Models) and were only produced from 1976-1981 (6 years only). Distribution was limited to the Japanese market only. Nowadays, the 6306 models are considered rare since they are scarce. Also, the rarity goes further depending on what...