| Stamps with this color combination:
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Description: slate blue & black
Abbrev: slbl&blk
Used by 7 stamps: (See all uses as list)
Brazil airmail 12/28/1927 50r issue=1927 air d=Marechal Hermes oc=blk on=issue=1913 official-10r unwmk perf=12
Brazil official 11/15/1913 10r issue=1913 official d=Marechal Hermes unwmk perf=12
Brazil official 11/15/1913 50r issue=1913 official d=Marechal Hermes unwmk perf=12
Cape Verde postage 1903 65r issue=1898 d=King Carlos (1898) unwmk perf=11.5
Cape Verde postage 7/1/1905 50r d=King Carlos (1898) oc=blk on=1903-65r unwmk perf=11.5
Costa Rica postage due 9/1/1903 5c issue=1903 due d=numeral unwmk perf=14
Panama airmail 10/20/1952 25c issue=Queen Isabella 500th unwmk
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