Dead Letter Office, Package Tracking Seals, Types 1-5. Group of eight different used examples of the five types comprising type 1: black with perf 12 and hyphen hole 7, type 2 in blue, type 3 in red and blue, type 4 in blue, type 5 in red with perf 11¼ and 12; some faults, Fine and scarce group. Scott No. OX  Estimate $100 - 150. $0 (Image)