Air Mail cover 1935 (April-October) Sikkim first and second Official rocket Mail experimental flights with missives and carried by sixteen rockets including the original contents list carried on the parcel flight (No. 6); also a fine range of unused vignettes including proofs, errors etc., many signed by Stephen H. Smith. A fine lot

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Air Mail cover 1935 (April-October) Sikkim first and second Official rocket Mail experimental flights with missives and carried by sixteen rockets including the original contents list carried on the parcel flight (No. 6); also a fine range of unused vignettes including proofs, errors etc., many signed by Stephen H. Smith. A fine lot