Cranstan or Craustan model glove?????

I bought a nice little youth glove a few weeks ago and can't find any info on it.It says Cranstan or Croustan with model # PCG- 551. Says custom made for professional players on the thumb and "Big Bill model" on the palm. It looks to be a late 60's or early 70's glove, but I can't find anything on the manufacturer. Its a really well made glove. Any info appreciated!