Join Date: Nov 2011
Location: Cambridge, New Zealand
Yes - it is definitely a Nickel bit - you may find SOLID NICKEL stamped on the mouthpiece somewhere. 50 years ago these were the normal bit. They clean up well with the liquid brass cleaner.
Check any areas that have moving parts as these bits are made of a soft metal that wears badly, the joint in the centre can wear very thin and they are known to break. Attack all sharp edges with a very fine file, also if the horse chews the bit you may find sharp areas on the mouthpiece. We used to have a pony that would grab and hold onto the bit and had actually compressed the metal so that there were flat areas on each side.
The bridle looks in very sound condition. Lucky you