@ Bonesquat: No, not pewter, in german it called "potin" - it's silver with bronce or some like that.
@ drewwski: I go for hunt since 5 years (nearly every day) but I also don't find such nice coins before. But I find from time to time some roman coins - think, the romans was also in Bocket-Waldfeucht so you should find some older coins, too. A big roman road (Römerstraße Heerlen – Xanten) crosses Waldfeucht... Next group hunt in germany is, when you invite the german searchers :-P But not in September - no I visit one week Austria (looking for some celtic or roman stuff) and after that I'll spend two weeks in Egypt (try to find some mummies).