Special Event Handstamps - Birds of Britain Postmarks

The Special Event postmarks as notified in Postmark Bulletin 40/18 2 September 2011.

12280 - 1 Sept 2011 to 31 Aug 2012 L	12281 - 9 Sept 2011 L	12282 - 9 Sept 2011 L
12283 - 15 Sept 2011 L This replaces 12257	12284 - 15 Sept 2011 L This replaces 12258	12285 - 15 Sept 2011 L This replaces 12259
12286 - 15 Sept 2011 L	12287 - 15 Sept 2011 L	12288 - 16 Sept 2011 N
12289 - 15 Sept 2011 W This replaces 12275	12290 - 16 Sept 2011 W