Germany, 1872 Small Shield, ¼gr violet, used with vertical pair and single of 5gr Bister (6), all tied by four strikes of "Frankfurt 6 1 73" double-circle datestamps on registered cover, various ratings and registry markings; one 5gr pre-use fault, a Very Fine use. Michel Nos. 1. Scott Nos. 1  Estimate $500 - 750. $0 (Image)