The 30 rp Switzerland is the michel 276 ( Zumstein 200) of 1934, the 40 rp Switzerland is Michel 537 ( Zumstein 305) , if have letter and numbers in the backside is a roll stamp, in this case catalogue reference change ( michel 537RI, Zumstein 305RM) and better value.
I collect German area speaking countries, Italian area speaking countries, Europa CEPT/Posteurop .
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