Did you check the google archives for rec.photo.equipment.large-format? If it's not in there the lens doesn't exist-)) If it's an older lens [pre 1940] you can check the serial number for the age here.

http://home.sprynet.com/~stspring/Zeiss%20Ikon.html

You can also check out the grimes website for some info on the shutter [I think] Is it one of those dial shutters?