I do not collect US per say (my interests are history & forgeries), I am finally sorting out a collection I got 40 years ago to auction at local club.
These are the particulars of this stamp
Size 19.5 X 22.2
Overall height 24.5
Perf left 9.8 right 9.7
No WMK
Rotary - no ink on back, slight smudging on front
Appears to be straight parallel cut?
Not a Type III - 1 dash both sides of ribbon (not 492), Type I or II?
Perfs on right - questionable??
*** Edited by Staff to clarify topic title. Titles are important! ***