I have a new to me, New Long Comb with common bar. It doesn't have the patent #s that I have seen it is supposed to have. Can the different numbers narrow down the production year?
Left:
Pat. No. 1633739
Pat. No. 1639335
Center:
Pats. Pend.
Right:
Reissue Pat.
No. 17567
Left:
Pat. No. 1633739
Pat. No. 1639335
Center:
Pats. Pend.
Right:
Reissue Pat.
No. 17567