Hello all classic bikes fans

I have gotten a RIH bike from a friend who lives close to Groningen. I have cleaned it, and lubrificated all the parts and refreshed the wheels with new spokes. It has Mafac dural forge brakes, luxe Citam stem, Steenbergen/A. Schotte steer, Huret Allvit 5 gears, Nervar chainwheel, Normandy hubs. It has a blue RIH plate on the front, RIH Amsterdam written on it. Further it has the Rih on both sides with the bustraan amsterdam in between. The are nu numbers ingraved at the place where normally the RIH amsterdam or Fongers are engraved. At the bottom of the headset on the left side i find the number 60.....at the lug on top of the seatpost I find the number 73....at the seatpost self i find a really ingraved number O5567 (zero or the letter O) and maybe followed by a K or X or this is some kind of damage...!!! This number can also be some kind of anti theft registration number. I am really happy riding the bike. I am born in 1968 in the Westerstraat, Amsterdam...almost above the RIH shop. Would like to know some more.... A man who has worked in the Fongers factory say to me it's not a Fongers but one made for sure in Amsterdam....and somebody from RIH said that he thinks it's not made in Amsterdam. Who know more...!!! I will add some more photo's soon!