Useful sites
General societies covering topics relevant to GBOS topics
GBPS Great Britain Philatelic Society (index)
COSGB Commercial Overprint Society of Great Britain, and Revenue Society webpage
ABPS Association of British Philatelic Societies (GBOS is affiliated)
APS American Philatelic Society (GBOS is affiliated)
Specialist country societies including GBOS topics in their areas of interest:
OPAL Oriental Philatelic Association of London (Levant)
ONEPS The Ottoman and Near East Philatelic Society (Levant)
Bechuanalands and Botswana Society
Postal Order Society discussion forum and website
Channel Islands Specialist Society
Eire Philatelic Society, Irish Philatelic Circle, Irish Philatelic Society
Information about stamps, relevant to GBOS interests
Major stamp events: Stamp Shows, Stamp fairs and auctions
Sandafayre's on-line library of images of classic stamps
(note: on the Sandafayre site Oil Rivers stamps are under "Nigeria" and "Niger Coast" instead of "Oil Rivers"; Mafeking stamps are variously under "Bechuanaland", "British Bechuanaland" and "Cape of Good Hope")
The Wolf collection of Irish overprints
The British Library philatelic holding
The Rossi auction from Warwick & Warwick, 2005
ABPS/PCGB Congress Study Group
Numerous hyperlinks to relevant other web pages (whether philatelic, historic, or general) are included wherever appropriate on each page. This is not intended to be an exhaustive bibliography or list of relevant web sites. Inclusion in this list is entirely at the discretion of the Web-manager.
page last updated: 19 July 2010, 6 Dec 2011, 21 Feb 2013, 30 Nov 2013, 18 June 2014, 10 September 2014
26 April 2015, 27 Oct 2015, 24 January 2017, 6 July 2017
gbos: GB Overprints Society