Does anyone have, or know where I can find a resource to determine the date of manufacture of Koni-Omega Rapid and Rapid Omega 100 cameras? I remember buying my first KO in the late 60's-early 70's, and my first RO 100 in the early 80's. I am looking to see if I can pin down exact dates based on serial numbers (?). Any help? Thanks. - Bob Erdman.