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Source:
Colnect
Issued by:
Kenya
Function:
postage
Date:
12/13
/
1977
Denom:
20c
Color:
multicolored
Design type:
minerals
(1977)
Design:
trona
Watermark:
unwmk
Perf:
14.75x14.25
Catalog value:
Prev:
10c d=gypsum (1977)
Next:
30c d=kyanite
External links:
Colnect 151291-Trona-Minerals
Record of changes
