on piece  1886-92 Key Type A 50c. showing variety "JF" handstamped over "BF" in purple, tied by purple h.s. on 1889 (June) document from the Surrogate Court. Believed to be unique. Photo
on piece 1886-92 Key Type A 50c. showing variety "JF" handstamped over "BF" in purple, tied by purple h.s. on 1889 (June) document from the Surrogate Court. Believed to be unique. Photo

Details
on piece 1886-92 Key Type A 50c. showing variety "JF" handstamped over "BF" in purple, tied by purple h.s. on 1889 (June) document from the Surrogate Court. Believed to be unique. Photo