1912 - LOTTO/10616L - SWITZERLAND - PRO JUVENTUTE PRECURSORS 3v. - HINGE TRACE1912 - SWITZERLAND - PRO JUVENTUTE PRECURSORS 3v. - HINGE TRACE

1912 SWITZERLAND - Precursors of the Pro Juventute issue (Cat. Unificato A/B/C). Mint, original gum with an imperceptible hinge trace. The set carried no postal validity but was accepted as a voluntary surcharge on mail. In 1912 it was sold at post offices and so received a regular cancellation.