My original "when I was a kid" G1 UltraMagnus, had a completely blue (unpainted) helmet head - I probably still have it kicking around in my old G1 bin
This might not be a botch job according to the wiki though; could be the "running change" version:
Originally, his tires were made of rubber and he sported paint on both his small and large robot heads, but this version was replaced with one featuring plastic tires and no paint on either head.
https://tfwiki.net/wiki/Ultra_Magnus...s#Generation_1
