Proof 1c Proprietary, 2c USIR, experimental trial color plate proofs (R3TC, R15TC), two pairs and three singles (seven proofs total), all on bond, incl. 1c in Red Orange, 1c horizontal pair in Pale Buff, 2c vertical pair in Green (top proof 'changling' to Greenish-Blue) and two Greenish-Blue color 'changling' singles (from 'testing'), some have faults, otherwise very good-fine lot est.

Details

Proof 1c Proprietary, 2c USIR, experimental trial color plate proofs (R3TC, R15TC), two pairs and three singles (seven proofs total), all on bond, incl. 1c in Red Orange, 1c horizontal pair in Pale Buff, 2c vertical pair in Green (top proof 'changling' to Greenish-Blue) and two Greenish-Blue color 'changling' singles (from 'testing'), some have faults, otherwise very good-fine lot est.