FPRC507 RAF Type B1 Roundels Mixed Vinyl Stickers
Mixed 5mm to 50mm
Water Proof Vinyl Stickers
on 95 micron Vinyl
On some aircraft March – December 1939.
Used on fuselage sides of some night-flying aircraft
bombers, e.g. night fighters, late 1940 – mid-1942.
Often type B with additional yellow ring (proportions do not match Type A).