British Guiana. 1850-51 'Cotton Reel' 12c. blue, signed "J. B. S" (mith), cut square and used with Demerara c.d.s., small thin visible through the reverse, otherwise a fine and sound example. Signed Pfenniger etc,. S.G. 5, £11,000 (Image1)

Est. £3,000-5,000

British Guiana. 1852 Waterlow 1c. black on magenta, used with good to large margins and light Demerara cancellation; some light surface rubbing and a slight horizontal crease, neither of which affect the good appearance. B.P.A. Certificate (2016). S.G. 9, £5,500 (Image1)

Est. £1,000-1,500

British Guiana. 1852 Waterlow 1c. black on magenta, large margins and good colour; repainted heavy vertical crease at left though a presentable example of this popular rarity. Pascal Scheller Certificate (2018). S.G. 9, £5,500 (Image1)

Est. £500-700

British Guiana. 1856 4c. black on magenta initialled 'E. D. W' by the Post Clerk E. D. Wight, cut octagonal and cancelled by central strike of 'demerara'datestamp for February 12th 1856. A very fine example of this rare stamp. Signed Calves, Champion, etc. S.G. 24, £25,000 (Image1)

Est. £7,000-9,000

British Guiana. 1888-89 Inland Revenue set of seventeen including 4c. with larger figure '4' and 6c. with '6' with flat top, part to large part original gum. $4 with B.P.A. Certificate (1999). S.G. 175-189, £2,000+ (Image1)

Est. £500-700