Lot 51360 – Proof overprints in black and red for the 5-line format

Proof overprints in black and red for the 5-line format of the low values: Specialised assembly neatly mounted and knowledgably written up on 19 album pages, showing singles, pairs, strips, and blocks of four and six, fresh, very fine, and a very scarce assembly and an excellent basis for study and expansion (58 proofs).