Hi Pat, I also have that MTH 4829. When I posted pictures of my engine one of the forum members said it was not painted that way. BUT the fact IS nobody knows for sure. Another forum member contacted me. He was involved in a GG1 research project looking through the Heritage Society's records. He stated he/they could find NO information on 4829.
THe only picture I have found is published in "Pennsy Power III" taken May 22, 1937. They also included an enlargement of just the Motor.
I have been taking and developing film since I was 5-years old(am an original Baby-Boomer). Have looked at all the GG1 pictures in this volume. The stripes have a greater specularity then the other images. And the GG! body has a darker grey scale tone. BUT again nobody knows for sure!
A few years ago there was an article on the Pennsy in one f the real RR magazines. The writer quoted some fellows that had indeed seen 4829. They stated that the stripes were silver and body dark. (what is dark?)
Somewhere have a published picture taken not long after the 1937 picture with full gold stripes and appearing lighter grey scale tone of body.
BUT nobody knows,
Ron