Creighton is right on. Westinghouse chests are VERY common, non coin operated, time consuming to restore($$$) and take up too much floor space to be desireable for home units.
Even if you get this cheap restoration done, you will still be $700 into it. No way for you to come out of it ahead, at least not in this decade. You can take the advice from the guys in this post or you can learn the hard way like the people trying to sell these restored machines on e-bay or Craigslist. It's an expensive learning experience.
On the same subject, your 39 and 81 are nice original machines. They will maintain a much better value left as is, or with a high quality paint job, but will be worth less with a cheap restoration.