Microscopy
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De La Rue chalky paper pit Malaya Straits Settlements KGVI 1937 4c postage stamp
de la ruechalky paperanalytical philatelypostage stampmalayakgvistraits settlements4cpittingpitcalcium carbonatecoating
De La Rue chalky paper pit Malaya Straits Settlements KGVI 1937 4c postage stamp
de la ruechalky paperanalytical philatelypostage stampmalayakgvistraits settlements4cpittingpitcalcium carbonatecoating
