Stampdesc British Guiana, issue=1866b-6c-bl

desc_issuer: British Guiana
desc_issue: 1866b
desc_denom: 6c
desc_color: bl

Used by 1 overprinted stamp:
British Guiana postage 1878 1c bl issue=1878 surcharges d=seal of British Guiana (1863) oc=blk on=issue=1866b-6c-bl perf=10

Not used by any images.

Matches 1 type:
British Guiana postage 1866 6c bl issue=1866b d=seal of British Guiana (1863) perf=10