SGX855ey Var 1971 Machin 3p ultramarine PCP/PVA type 1B phos omitted Full perfs Spec U103b

1971 Machin 3p ultramarine PCP/PVA type 1B u/m with variety phosphor omitted (ex 3p x 12 pane from 1 Wedgwood booklet & not known from any other source) Full perfs Spec U103b var Conn 78NP Cat (Conn) 60 Pounds