1. Philatelic 11 Reference (shelfmark): Philatelic 11 Title: Contributions Agency Collection Scope & Content: Collection of British National Insurance Stamps, primarily the essays for the unissued 1993-1994 set and a manual 'Grovering' machine for cancelling stamped cards. Collection Area: Philatelic Collections Languages: English Date Range: 1993-1994 Extent: Extensive