Details
Proof 1840 (March) die proof in black on India paper mounted on soft white card, taken after the top and bottom labels had been engraved, the four corner squares blank. Thought to be one of only two known examples outside institutional collections. S.G. Spec. DP17a. Photo in colour
Provenance
"Rainbow", 1986
Further details
Note: Two examples differing very slightly are in the Royal Collection and another is in the N.P.M. Collection.