3d. on Stephansort, block of four (#962-963, 967-968), positions 3-4 and 8-9, block of four, vertical perfs re-enforced, fresh color and good perforations, used with clear strikes of cds. "STEPHANSORT", a very rare and attractive multiple, just 50 labels were overprinted for postage from this setting (numbered between 951 and 1000), Gibbs stating on page 103 of the handbook, that no unused examples are recorded, this being one of just three known multiples, two blocks of four (including this one) and a pair (sold at Corinphila in 2018)
Provenance: Robert M. Gibbs (78. Corinphila, 1988)
Reference: depicted in G.R.I. by Robert M. Gibbs, page 98
