Lot 70442 – 1973 Machin undenominated proofs produced during commissioning of the Jumelle press, three pairs

1973 Machin undenominated proofs produced during commissioning of the Jumelle press, three pairs in violet (approximating the colour of the 5p), turquoise (colour of the 1/2p) and new blue (later issued 4p), small wrinkles as commonly seen, a scarce trio, plus 1971 Post Office training stamps for 2p, 2 1/2p, 3p, 3 1/2p and 4p in mint n.h. blocks of four.