ID HELP - is this a 1991 Koga Miyata Ridge Runner?

[Oldschool.ED]

Hi, can anyone id if this is a 1991 Koga Miyata Ridge Runner frameset? I doubt that the decals are not original but I want to hear your thoughts.

Thank you!

You have got a skyrunner frame with ridge runner decals.

 

[Oldschool.ED]

You have got a skyrunner frame with ridge runner decals.

 

[Oldschool.ED]

Sorry now i am not sure anymore, compairing your photo's to the ones in the catalog and the picture from elev12