hello, thanks for the reply. Here some more photographs. Strange for me after seeing a lot of RIH and Fongers-RIH. I see some quite old lugs at the headposts. The lugs at the Fongers-Rih are more simple formed. But I am not an expert. Thats why i am on this forum to share my RIH to expand the knowledge of this bike. I have taken a look at all the parts. Quite difficult because some parts are made for a long period...and can also be added later to this frame...or vice versa the bike is not that old but the old parts where still used because they were still in stock.