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Source:
Colnect
Issued by:
San Marino
Function:
postage
Date:
3/26
/
1992
Issue:
Centenary of the radio
Denom:
750l
Color:
multicolored
Design:
air gaps &
Heinrich Hertz
Watermark:
unwmk
Perf:
Catalog value:
Prev:
9/24/1991 750l d=equation & James Clerk Maxwell
Next:
3/26/1993 750l d=Edouard Branly (1993)
External links:
Colnect 71517-..y_of_the_radio
Record of changes
