Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1443 
Martini, Pangerl 66
nailed helmet
circular (or slightly oval) 
8 x 7 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
Show 377
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Show 373
Show 248
Show 378
Show 246
Show 321
Show 199
Show 273
Show 238