Lot
2131 
/o
Proprietary, 1871, 6¢ green & black, double transfers, single of each showing double transfer variety, violet paper is mint o.g., h.r., green paper with printed "E.F. & Co., N.Y., Jan. 1. 1876" cancel, Very Fine and rare double transfer varieties, The RB6a double Transfer is unpriced in Scott, while the RB6b is unlisted. Scott Nos. RB6a, RB6b var. Estimate $300 - 400.
Realized: $300