Estonian kroon until the Soviet invasion in 1940 and Estonia's subsequent incorporation into the Soviet Union when it was replaced by the Soviet ruble. After Estonia regained its independence, the kroon was reintroduced in 1992. The kroon became the currency of Estonia on 1 September 1928 after having been a unit of account since 1924. It replaced the mark at a rate of 100 mark = 1 kroon. The kroon was subdivided into 100 sent. In 1924, the kroon was pegged to the Swedish krona at par, with a gold standard of 2480 kroon = 1 kilogram of pure gold. The standard
De Kroon, Arnhem spur wheel", which has 80 teeth. This drives three pairs of millstones via "lantern pinion stone nuts", which have 2632 staves each, apart from that driving the pearl barley stones, which has 24 staves. The millstones are a pair diameter Cullen stones, a pair of diameter Bentheimer stones, and one pair of French Burr stones. References for above:- "De Kroon" is open Fridays 13:30-16:00 and Saturdays 09:00-12:00, or by appointment. Windmills in Arnhem Windmills in the Netherlands Open Air Museum De Kroon, Arnhem De Kroon () or the Klarendalse Molen is a tower mill in Arnhem, Gelderland, Netherlands which was