Can anyone tell me what the Scott numbers are for these 3 stamps? The 10 and 15 F colors seem to be a little odd. The one with the overstrike actually may be German.
The 10F is Sc600 and the 15F is Sc602. The color is quite normal. The 10F was used between 1948 and 1954. The 15F between 1949 and October 1951. It was used for regular letters. The third one is a double overprint made for usage in te Memel territory, under French mandate after WWI.
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