Lot 1184 LONDON E.C. (Experimental) squared circle, a very fine strike of Type 3 (Figure 69 on page 281 of Handbook) dated AX / OC 30 / 90 on an uprated stationery card to Chaux de Fonds, Switzerland, with receiver on front. The Handbook only reports one other strike (dated OC 1 / 91) so this could be one of only two known. Very fine, quite rare and desirable. Estimate $500.