@amanico have you seen any documentation on the first dates of release of the original 5907? I had thought it was the late 50s, but the name of the new LE tells us 1961. I just have never seen ads from when the 5907 was first released. I have see one ad showing the first Ocean Star models were from 1959, seen one piece with a bracelet from 1960, and have one email from an exchange with Mido where they dated a piece at 1959 (221xxxx serial), though in a later email they said first production in 1961. I guess they have more information to lock down the date at 1961, though I've never seen it - wondering if. you have.