A couple of years ago, I was able to analyse some 10,000 coins and medals in the collection of Teylers Museum, Haarlem, the Netherlands, with a handheld X-ray fluorescence (XRF) analyser. Since then, I have been working on my own through this data. In this paper I present the data from 196 emergency coins from the period 1529-1814, mainly produced in the Low Countries (the Netherlands and Belgium) in the Eighty Years’ War (1568-1648).
Some 50 of these emergency coins were in the private collection of the founder of the museum, Pieter Teyler van der Hulst. These objects were collected before his death in 1778. This provenance is of some use in the research on later copies and forgeries. The XRF-measurements provide us with new information about the moment of production. There appears to be information hidden underneath the surface of the coins...