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Switzerland 1976-79 Postal automation switch franking mark 5v FRAMA switch device with date frame (without time), white paper with glossy gum, Device 8021 Zurich 21 Annahme VIII/1 5.6.1979, carmine rose - lilac, single value MNH, Catalog SBK SFS 5v. Remarks: As an experiment, the PTT used finely coated paper with glossy gum (V-paper) at the Zurich and Friborg post offices. The smooth surface turned out to be unsuitable. This caused problems with the paper transport device of the devices, which is why a large part of these SFS with shiny rubber are cut too short (from the special catalog Schalch 1993/1994).