Czechoslovakia 

 
1324  The oldest record of a goldsmiths guild in Prague. 
1562  Ferdinand I approved the guild rules of Prague goldsmiths. All items weighing more than half a hrivna (a Prague hrivna weighed c. 253 grams; 64 Prague groschen were made from one hrivna) had to be submitted to the guild for assay. The items had to be marked as follows: 
1. town mark; 
2. maker's mark (mostly in monogram) . 
1776  New guild regulations for Prague goldsmiths were introduced. Provision for the election of three craftsmen to hallmark silver pieces. The Prague goldsmith's guild was the so-called Land Guild. i.e. all goldsmiths in the Kingdom of Bohemia were obliged to observe its regulations. Only 13 lot silver was permitted to be used. A special hallmark was decreed for lower standards of fineness. 
1785  15 lot silver was allowed to be used and a new mark was introduced for it. 
1788  The following purities for silver were stipulated by law: 13 lot (= 812.5/1000) and 15 lot (= 937.5/1000). Hallmarking was still carried out by appointed guild masters.  Items were marked with three stamps: 
1. the maker's mark 
2. the mark of Bohemia (for Prague), or the mark of the town where the maker worked 
3. the mark of fineness. 
1806  A basic change occurred in the hereditary Austrian lands in hallmarking precious metals: the right to mark the products was taken from the guilds and given to the state. (For details on this and subsequent changes see Austria.) 
1921  The former Austrian marks of 1872 were abolished and Czechoslovak hallmarks were introduced. Permitted fineness:  950, 900, 800 and 750/1000. 
1929  Introduction of new marks and new purities of 959, 925, 900, 835 and 800/1000. These marks were valid until 1940. 
Slovakia, as part of the former Austro-Hungarian Empire, belonged to Hungary until 1918 and was  subject to Hungarian regulations.