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She was built on a provisional yard at Schaffhausen by Robinson & Russel of London for the Schweizerische Dampboot-Aktiengesellschaft.
16 May 1851 launched as STADT SCHAFFHAUSEN.
Dim. 45.45 x 4.5m., over paddle boxes 8.83m.
One steam engine 160hp. speed 19.5 km/h.
Passenger carrying capacity for 300 persons.
Homeport Schaffhausen, Switzerland

She was the first Swiss Bodensee (Lake Constance) steam ship; she was used on the River Rhine and the Untersee and Obersee.
23 July 1851 maiden voyage on the Bodensee, at that time she was the largest and fastest steamer on the lake.
When in 1856 the railway Winterthur-Romanshoff was completed, the Schweizerische Nordostbahn-Gesellschaft in Romanshorn built the largest port till today on the lake.
The same year both companies merged and the STADT SCHAFFHAUSEN was transferred to the Schweizerische Dampfboot AG.
The STADT SCHAFFHAUSEN homeport became Romanshoff.
From there she was used in the service between Romanshoff and Schaffhausen till 1863.
Thereafter the competition became too great with the railway between Waldshut and Konstanz.

During the winter of 1862/63 she received a new steam engine of 200 ihp, her old engine was already removed in 1861.
Thereafter was she used for some time as a tug.
1892 Out of service.
1893 Broken up.

The stamp design is based on a sketch by E. Hofmann which you can find in the book Die Dampfschifffahrt auf der Bodensee page 98 by Werner Deppert.

St. Thomas & Principe 1984 7d sg?, scott 754b.

Source: Navicula and http://www.bodenseeschifffahrt.de/Rhorn ... ausen.html