Watch List notes:

Netherlands, Arnhem, Musis Sacrum brass '100' token, uncertain date, MUSIS SACRUM ARNHEM around 100, rev. 100, certified and graded by NGC as Mint State 64
The Musis Sacrum concert hall in Arnhem was built in 1847. The name means 'sacred to the Muses'.

Estimate: 50 - 100 GBP