Proof -- 1r.50c. on 2r. 50c. imperforate colour trials (2) in violet and in bistre-brown, affixed on piece of lined paper (95x38mm.)

細節
Proof -- 1r.50c. on 2r. 50c. imperforate colour trials (2) in violet and in bistre-brown, affixed on piece of lined paper (95x38mm.)