I've got problems finding information about the production date and the frame of my Shogun. I picked it up about three months ago and want to rebuild it this summer.
The brakes are Shimano Turney, the levers have no specific name, only the old Shimano logo. The RD and FD, cranks, shifters, freewheel and hubs are 600 Arabesque. Rear dropouts are by Shimano, the front dropouts have 'Tange-TF-R' engraved.

The SN is Y2DC126

Unfortunately, there are no decals on the fork/frame. Does anybody have an idea about the tubes used?

Sorry for the image quality, my DSLR is broken so I had to use the IXUS.