Stamps with this color combination:
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Description: gray & light brown
Abbrev: gray<brn
Used by 2 stamps: (See all uses as list) Belgium semipostal 6/21/1965 3+1fr issue=Hoffmann memorial unwmk perf=11.5 Panama airmail 7/18/1956 6c issue=Pan-American Congress 1956 d=General Manuel Odria unwmk |