Celtic, Rhine Valley Area. Circa 1st Century BC. AV Stater, 7.55 g. Regenbogenschüsselchen. 

Raised circle or dome.
Cross or four-pointed star. 

De la Tour 9455 var; Konig pl. 2, 2b.

With permission of cngcoins.com, auction 46, Lot 20, June 1998.