Hello David,
Czechoslovak governement has approved Victory medal in 1920. Czech own desing medals ( Laslo Official Type 2) were produced in 1922. Before this, governement has approved a wearing of Belgian model medals (Laslo Unofficial Type 1 and Type 2) , which were produced by several private companies. Two of producers, Alexander Leisek and Edward Riemer, marked their medals. These are quite common, if you wish I can obtain them for you. And of course, if you come to Prague it will be a pleasure to meet you personaly , to show you some medal shops, invite you for a lunch or a beer .
Jan