The convention foot was a coin footer , which by convention , i.e. H. State Treaty , was established. The convention base is the coin base that Austria agreed on with several German states in the middle of the 18th century. This determined that 20 gulden or 10 speciestalers ( i.e. 1 thaler = 2 Austrian guilders) should be minted from the Cologne marrow of fine silver . Since the Cologne mark weighed approx. 233 g (with regional variants), a guilder had a fine weight of 11.69 g of silver.
The money minted according to this standard was called the convention thaler or convention coin . This designation was retained after the convention states, with the exception of Austria, switched to a different standard.
Austria had left the Leipzig foot in 1747 (at 12 thalers or 18 guilders from the fine mark) and from July 1748 had initially minted the thalers at one foot of 19 guilders 3⅓ kreuzer, but on November 7, 1750 in its countries it went to a 20- Gulden-Feet over and called the new two-guilder piece thaler. In order to enlarge and secure the currency area, Austria concluded a convention with Bavaria on September 20, 1753, which also introduced the 20 guilder footer in Bavaria; Since then this has been called the Convention Foot. Saxony and many other German imperial circles and estates also introduced the Convention base. However, Bavaria withdrew from the contract before the end of a year and switched to the 24-guilder-foot.