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TONGA - 1894 complete used surcharge set which also includes some of the extra varieties. Comprising of the ½d on 4d chestnut SG 21; 'SURCHARCE' variety in pair with normal SG 21+21a; ½d on 1s brown SG 22; 'SURCHARCE' variety SG 22a; 2½d on 8d mauve SG 23; no stop after 'SURCHARGE' variety SG 23a;  2½d on 1s deep green SG 24. Cat £190 (8 stamps)