Is there any books or articles in English about monetary system in East Prussia in 16-19th centuries ? Also is there any literature in English about foreign coins circulation in this part of Germany in 16-19th centuries ? I'm looking for answers to questions like "What kind of foreign coins were circulating ?", "Why these coins ?", "What was the attitude of local government to these foreign coins ?" and so on.
Poke around this site and send an inquiry to see if you can get some help there: coinbooks.org and numismatics.org
Try here for online information http://www.ccoins.ru/germany/pruss_east_en.html and here for other dates when East Prussia was incorporated into Prussia http://www.ccoins.ru/index_en.html