During the isolation due to Covid,I try to identify the few USA stamps.
Being a beginner in the United States stamps with the help of Scott specialised and "stampsmarter" I try to identify them alone (colors confuse me)
I started with the middle stamp:
-flat printing (off set on back)
-dimensions 19.2 x 21.5 mm
-color green?? deep/dark green ?
I think it is Scott#552.
My question concerns the left edge of the stamp (white part larger than 2 mm) where the "Guide line" should appear and the hight of stamp 21.5mm
Any indication is welcome. Thank you.