Mark IIC+ verification help needed

[Any]

Hi.
I found IIc+ I think serial 1279x,RP-11A board ,effect loop passed but not any mark on it as usually my others mk II or III so no + or initials also nothing under or side chassis at all date ,tubes type etc .
Question it's if I should be contact Mesa to confirm what it is or any one can se the photos and can help about that please.

 

[JD]

Its a C+

 

[Joey1970]

RP-11A says that is a C+. It is either a HRGX or a DRGX model.