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Nederlandsche Stoomboot Maatschappij (The Netherlands)

[Nederlandsche Stoomboot Maatschappij houseflag]

image by Martijn Nekkers, 25 February 2022

Description of the flags
Funnel markings

See also:

Description of the flags

De Nederlandsche Stoomboor Maatschappij (Netherlands Steamboat Co) was the first steamboat co in the Netherlands. It was established with the help of King William I in 1822. In 1823 the first Dutch steam vessel was launched: a ferry on Hollands Diep named Wilhelmina, developed by G.M. Roentgen, the steam engine built in England. The company not only was involved in shipping but started to build vessels as well on its own shipyard. Services. First services were Rotterdam-Antwerp (1823-1847) en Rotterdam to Mannheim (until 1955). In 1886 the name of the company was changed in Nederlandsche Stoomboot Reederij. The original company had a wide range of house flags during the years.
Sources: Heinrich Fischbach; Magazine Sleep en Duwvaart 2018/06; Nederlandsche Raderboten (by J.W. Lodder); Brown's flags and funnels 1926; Amsterdamsche Almanak 1893, 1920; Rotterdam Maritime Museum.
Martijn Nekkers, 25 February 2022

Nederlandsche Stoomboot Maatschappij, Rotterdam (Dutch Steamship Co.) - quartered swallowtail, red, green, blue, green (hoist is 1/3 of flaglength), white hoist diamond, black "NSM".
Jarig Bakker, 26 Jan 2005

The green in the fly of this design suggests it's an amalgamation with only in part a Rotterdam origin, with the green for Rotterdam.
Peter Hans van den Muijzenberg, 25 February 2022