De Zwaluw (English: The Swallow) is a smock mill in Oudemolen, Drenthe, the Netherlands.

[2] In 1951, millwright Christiaan Bremer of Adorp, Groningen fitted a new cast-iron windshaft to replace the previous wooden one.

The four Common sails have a span of 20.00 metres (65 ft 7 in) are carried in a cast-iron windshaft, which was cast by Fabrikaat Prins van Oranje of The Hague, South Holland in 1893.

At the bottom of the upright shaft the great spur wheel, which has 79 cogs, drives the 1.40 metres (4 ft 7 in) diameter Cullen millstones via a lantern pinion stone nut which has 25 staves each.

As of October 2009, the inner sail stock is the oldest surviving example made by Christiaan Bremer.