Help wanted on early CMP C15

[JohnG]

Hello,
My name is John and I am living in the Netherlands. Recently i came across a early C8 (I think) cab11. With a 2A1 body. It is partly restored with care and the vihicle seems very complete to me! Unfortunatly No dateplate;-(
I have bought it (I consider myself very lucky!) and start completing the resoration asap
The truck is stil at the Sellers address. I Will post pictures when I pick the truck up.
I would like to ask the experts on this forum if they can point me in the right direction regarding the research on some numbers and letters i have found on the engine.

I have seen the following markings:
0R CH dP (small letters left above the following characters on the same spot)
PV50I6xx (I am not sure on the P could be also a R, the last two are digits but I prefer not to reveal them)
I would be happy with what ever information regarding the engine comes up and if there is a link with the model it sits in.
Thanks in advance!
John