Stamps of Great Britain - Guernsey, 12.5x12 perf
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postage due
1969, Oct 1 1969 postage due issue numeral on Castle Cornet & St Peter Port unwmk p. 12.5x12 (7 stamps)
1971 1971 postage due issue numeral p on Castle Cornet & St Peter Port (7 stamps)
1975, Oct 7 Castle Cornet issue
| - | 6p | brtvio & blk | Fort Cornet (1976) | |||
| - | 8p | org & blk | Fort Cornet | |||
| - | 15p | gray & blk | Fort Cornet (1976) |
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