I am looking at a used Caltar II-N 360/6.8 serial number 10624 261 and the seller does not know its age. It looks like this is a Rodenstock APO Sironar N 360/6.8. I called Calumet and they said that if it is under 7 years old then it is the APO Sironar N. Can anyone help identify this lens?

Thanks, Peter Shier

-- Peter Shier (pshier@mindspring.com), June 08, 2001