Dear Mr. Zamiara, Thank you very much for sending photo, it is much helpful. This watch is produced in Japan in mid of 1960’s as FRESHMAN series. It seems rare for the King Diver watches to apply 17 jewel caliber. Regret to inform you that there are no more technical data of this watch and it is all information we can provide. Sorry for few information. Best Regards, ORIENT WATCH CO., LTD. http://www.orient-watch.com/ Z Wietnamu