Browse Listings in Errors & Varieties (see also GBPhilately.co.uk) > Inverted Watermark
1965 Battle of Britain 1/3 (phos). Cyl. 1A1B1C1D1E no dot. INVERTED WATERMARK. SG 678pWi
WATERMARK INVERTED.
£40.00
IanLasokSmith
1967 Flowers 9d (ord). WATERMARK INVERTED. SG 721Wi.
A fine unmounted mint single WATERMARK INVERTED.
£0.25
IanLasokSmith