Oh Ladies an Gentlemen, Iīm most delighted by so many answers and comments! I didnīd expect that.
@ wendy177, I contacted the address you gave and if I get some informations I will of course post them here.
@ KC, unfortunately no silver marks, Iīm not looking to sell them but the patina is quite nice actually so I think Iīll keep them that way - thanks for the advice
@ rockandrollrods, great informations, sounds quite logical! For me the person in the long trousers also seems to be english
@ talesofthesevenseas, I agree totally with you - from photos it is often almost impossible to judge, sometimes you need the "hands on" approach.
Best regards!