12 var, 1966 12c Brown and black, De La Rue overprint, Imperforate plate proof, top left corner margin block of four, NH, choice Very Fine, 2010 Sismondo certificate (Image)

CV. 200-250

SG 420a, 423b, 424b, 424c, 437a, 1967/68 1c/48c Local Overprint Errors Selection, 1c inverted overprint, 4c inverted overprint, 6c inverted overprint, double overprint plus double overprint, both inverted (unlisted), 48c inverted overprint, NH, F-VF (SG -ú400+) (Image)

CV. 150-200

SG 423b, 1967 4c Violet, Overprint inverted, bottom left corner plate no. 4 block of four, NH, folded along horizontal perfs, NH, fresh and F-VF (SG -ú320) (Image)

CV. 150-200

SG 429a, 1968 1c Black, Overprint omitted, left margin single, stamp NH, lightly hinged in the margin only, Very Fine, only one sheet with missing overprint recorded - this 1c value with "Block CA" watermark was not regularly issued without the overprint (SG -ú350) (Image)

CV. 150-200

GUYANA 1966/67 INDEPENDENCE OVERPRINTS COLLECTION. exhibit-type collection with majority neatly arranged and annotated on homemade pages, replete with mint, used, multiples, errors and varieties, uses on covers and airletters, etc., a few highlights include (SG numbers) 378-84 NH, 422a on cover, 423b NH and on cover, 424a in used plate block of ten, 424c NH, 431a in used plate block of ten, etc. plus wide range of overprint varieties incl shifts, generally F-VF, accompanied by some collector notes and refernce on the issue, ideal for continuation (see online scans)

CV. 600-900