Here is my recently bought dutch skipper clock, in the Netherlands called "staartschippertje" for small tail skipper. This type of small clocks was used on board of the boats that sailed the rivers, lakes and canals in the Netherlands during 18th and 17th century. They have a verge escapement and a very short pendulum which results in a very fast ticking clock which kept on running even when the boat was on one side during sailing. This one dates from around 1820.
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