This is my first post... I just purchased a Rolleiflex 3.5 75mm Planar at an estate sale and had it CLA'd. Today I sat down to look up the serial number and I'm confused. The serial number is DBP 1863370 DBGM, but when looking at the serial number lists provided by many of the rollei websites out there, the features don't match up. Can anyone help me identify this camera model? I'd like to sell it locally in the Bay Area or on eBay, but need to know the exact model number before I can do that. Thanks for your advice! Best, Ben