I think Ian is right. Gordon, if you go on KuK-Kriegsmarine.at, you'll see that SMU40 was built in Pola by Cantiere Navale (in italian it means shipyard: Don't forget that at those times Istria, a mainly italian speaking land, was under the rule of Kaiser Franz Joseph...). By the way, in my last post I forgot to give you another interesting site. If you go on the page , you'll see the changing of the Austro-Hungarian war flag during WWI (the same flag you see on the U-bootkappenabzeichen). Regards, Niko