Flood relief – “Unwetter in der Schweiz” – overprint with a Salvation Army logo (Helping Hand)

Issued 07.09.1987 (overprint)

Postmark: Dubendorf – pictorial PM (airplane) – registered Dubendorf

Cachet: Zurich

Stamp: Stanley Gibbons 1138 (overprint on SG 1109)

Size: 162 x 114 mm

Remark: Rare cover