£1,200
1912 PRO-JUVENTUTE LABEL: Carmine example used on PPC of dogs in snow dated December 1912, postmarked Les Brenets to Basel. This was the first issue which sold for 10 centimes each but had no postal validity. Certified by Liniger (1973) and Marchand (2001). Also an example on piece dated 6th January 1913 and pmk Zurich. (ex M+R Gunther).
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