Stamps with this color combination:
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Description: gray & green & black
Abbrev: gray&grn&blk
Used by 2 stamps: (See all uses as list) Hong Kong postage 8/11/1976 20c issue=new GPO opening d=Chinese chars wmk=crown & CA spiral perf=14.5 Portugal postage 9/5/1973 5c issue=1972 dt=scenic (1972) d=aqueduct in Lisbon unwmk |