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1859 Stationery. 1d. Pink envelope. Fine used example, cancelled by the Kingston experimental duplex.

£160.00

1871 Azemar Experimental Cancellation. 1d. pink entire to Kilwinning, with a superb strike of this scarce cancel.

£550.00

1912 Wilkinson Experimental Slot Machine. Cover to Catford with a neat impressed LONDON E.C/ POSTAGE PAID in magenta.

£210.00

1921 SG413a Bradbury Wilkinson 2/6d. chocolate-brown. Experimental printing, watermark sideways and reversed. Unmounted.

£675.00

1922 1d. Pale Scarlet. S.House Experimental Printing. (very course impression)

£550.00

c.1859 1d. Pink Envelope. SALISBURY “683” experimental handstamp.

£975.00

c.1861 De La Rue Experimental Postage – Three Pence, Essay’s.

£295.00

SG122a 1872 6d. Chestnut Pl.11 (IG). Salisbury “683” Experimental Handstamp – Without Pins.

£210.00

SG172 1899. Experimental Registered envelopes, one used, one mint with precise instructions on how to use – addressed to Major Evans.

£500.00

SG2 1840 1d. Black plate 7, SA. Used in London, placed unusually at the left hand side and cancelled by a black experimental maltese cross.

£295.00

SG29 1855 1d. Red-brown (QG). Die II. LC. P.14. BLUE Handstamp – Experimental KILMARNOCK Duplex.

£125.00

SG327 1911 1d. Carmine-red. Die 1A. Paper Trial. Experimental Chalk Surface Paper. Without WMK.

£250.00

SG34 1855 2d. Blue Pl.5 (BB). LC. P.14. LIVERPOOL experimental dotted circle or “pin” cancellation dated JN. 28. 1856.

£150.00

SG34 1858 2d. Blue LC14 pl. 5 (IB) on cover to Ashburton, neatly cancelled by the Exeter Creswell experimental duplex dated JA.11.58.

£165.00

SG357var 1922 1d. Pale Scarlet. Somerset House experimental Coil Printing. “SPECIMEN” Type 30.

£1,100.00

SG398var 1922 1d. Pale scarlet, watermark Simple Cypher, Somerset House experimental printing.

£295.00

SG398var 1922 1d. Pale scarlet, watermark Simple Cypher. Somerset House experimental printing.

£295.00

SG419b & 420e 1924 1d. Scarlet and 1½d. Red-brown. Wmk. Block Cypher – EXPERIMENTAL PAPER.

£695.00

SG419b 1924 1d. Scarlet. Wmk. Block Cypher – Experimental Paper.

£180.00

SG419b 1924 1d. Scarlet. Wmk. Block Cypher – Experimental Paper. Superb u/m “B 24” control.

£200.00

SG42 1862 1d. Rose-red Experimental Corner letters, pl. 51, GD. On superb cover Dublin to London.

£120.00

SG420b – 1924 1½d. Red-brown. Block Cypher. Experimental paper.

£650.00

SG420g 1925 1 1/2d. Red-brown Experimental Paper. Very fine, lightly mounted D25 control example.

£250.00

SG43 1866 1d. Rose-red pl.81 neatly tied on cover to Launceston by a very fine strike of the Creswell Experimental duplex of EXETER.

£85.00

SG43 1871 Azemar Experimental Duplex Cancellation 1d. Rose red, pl. 118 on printed entire to Derby dd. 31.Aug.1871.

£125.00

SG43/ 44 – 1864 1d. Rose-red.(OJ-OK). Azemar Experimental Machine.

£750.00

SG45 – 1858 2d. Blue (IB & SL). Thick Lines. Charles Rideout Experimental Machine Duplex.

£95.00

SG503 1951 ½d. Pale Orange. Rare 1952 experimental coil used in vending machines in exposed locations.

£275.00

SG58 1857 6d. Embossed, touched/ in at base. Cancelled with the rare Birmingham “75” experimental roller cancel – a short lived experiment.

£195.00

SG94 1869 4d. Vermilion (LD). Wmk. Large Garter. SALISBURY “683” Experimental Handstamp without Pins.

£150.00

SGD14 1924 3d. Dull violet EXPERIMENTAL PAPER – Very fine, lightly used horizontal block of 6 – rare.

£395.00

SGD14b 1924 3d. Violet experimental paper. Fine used marginal block. Scarce.

£225.00

SGME1. 1d. Mulready Letter Sheet. Experimental period in London of the black MC. Local use dated Oct.5.1840.

£325.00