/revised 6 Apr 2010
T 16 2/3
Bell 16.5x19.5 mm
Colour: Black
Items known:
18.3.1937 Göteborg to London (UK), black
10.5.1938 Göteborg 1 to Freiburg/Br (DE), black
22.8.1939 Käringön to Genève (CH), black
8.5.1940 Göteborg via Mulhouse and Zürich to Thann(CH), black

22.8.1939 Postcard to Switzerland. Correct rate 20 öre. Shortpaid 10 öre. Amount due 2x10/1.2=16 2/3 ctm. At this time Switzerland did not use the UPU rule for postage due on incoming mail. Instead, before, 1 Jul 1953, the amount due was calculated as the double amount missing in the sending country divided by the foreign letter rate in the sending country multiplied by the Swiss foreign letter rate rounded up to nearest 5 centimes. For this letter it would be (2x10 öre/30 öre)x30 Swiss centimes = 20 centimes (Litterature: Schweizer Briefmarken Zeitung 2003:10 p. 348-351)