It's an 808 Chronomat...what data are you looking for? http://forum.watch.ru/attachment.php?attachmentid=1391350&d=1462582764 Late 60's is my 30second guess from scanning that 100 page PDF on the history of the chronomat. 5th google entry for "808 chronomat history". It's basically the post on WUS but has the pictures which was entry 3.