Carrier Department Issues. Four different, incl. Nos. 4LB20, 5LB1, 6LB9-6LB10, original gum, except 6LB9 unused (no gum), 6LB10 oxidized (post certification), otherwise Very Fine, with 1990-96 P.F. certificates, also incl. Very Fine No. LO2 used with red cancel
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