The hardest thing about figuring this out is the fact that it is a 5 band resistor and no 5 band resistor has a 5th band that is yellow. There is no yellow tolerance for the 5th band.
Apparently it was used as an indication of some extra standard, and I've heard the yellow 5th band means it's "high reliability". Maybe somewhat standard of a marking for the time, but now mostly lost to time as the technologies to make and rate them have changed a lot. The carbon resistors from that era are anything but particularly stable, and have often drifted up as much as 10% or so in value.
FWIW, I don't think 25ppm is anywhere close to correct, carbon resistors are going to be hundreds, if not a thousand ppm/C drift.