J. C. Ayer & Co., 1c Black, Ty. 2, Old and Silk Papers, Imperforate (RS4f-RS4g). Singles of each, first with sealed tear and small thins, appears Very Fine, second sound and Very Fine, with 2012 P.F. certificates as RS4a-RS4b (Type 1) but we believe these are Type 2, the latter graded VF80