GB 1971 Machin 4½p booklet pane unmounted mint good perfs, r1/1 dots in front
GB 1971 Machin 4½p booklet pane unmounted mint good perfs, r1/1 dots in front of face variety also 3½p 2B PVA booklet pane unmounted mint perf APPL good perfs [ref 287bb/ s/9u0570]