Right click?
No - no "right clicking" or punching the image through the Google Image grinder (which I'm sure we're ALL aware of by now), but just flicking through old Jane's and Observers. I knew it was either from Indonesia or the Philippines, but I just never realised how old this was - first flight in 1954.
My extensive legal team informs me there is no way I can prove my innocence from this end, so until the internal inquiry is settled -
I'll declare Open House.
Yours Sincerely,
Sherlock.
Interestingly, Jane's gives the full manufacturer as ANGKATAN UDARA REPUBLIK STAF TEKNIK, DEPOT PERAWATAN TEKNIK UDARA, SEKI PERTOJOBAAN.
William Green lists it under "N" - for NU-200.