RJM1, 1937 $1 Yellow green,imperf block of 10, "SPECIMEN" overprint in selvage, a couple light wrinkles at tiny tears at bottom left selvage, thin in top selvage and a few staple holes at edge of center selvage (one of which tears off a little selvage), interesting position and historical piece, Very Fine centering (Scott $5,000 as 5 imperf pairs)

CV. 2,000-3,000