We are restoring what we believe (no name/i.d. plate found) to be a Tolkhem 870. Its a tapered, square bodied, clock face pump, and looks an aweful lot like one pictured in some of the books we have. However, this one has a "ledge" at the waistline, which seems to distinguish it from the others we've seen in pictures. Is this a rarer version of the 870 pump or are we off track. I know a picture would help you answer my question, but am unable to post one right now. Has anyone seen an 870 with a ledge, or better still, does anyone have a picture(s)of such a thing? Thanks in advance for your replies. BH