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Switzerland 1988 vignette machine stamps (Automatenmarken) black print special sheet, Black print of the machine stamps "Type 7" with machine stamp Type 7 (SBK ATM 7A, Michel 3.6) canceled "3030 Bern Philatelie PTT 18.7.88", Format 40x32mm, printing: etching gravure, Copyright Schweizerische PTT-Betriebe.