I cannot find information on this particular meter. I've compared it to other Universal Enterprises Meters of that era and this is the only one that seems to come with a hard case. I'm thinking it's probably worth more than $53, but because I'm unable to get you solid information, I'm going by the price of the comparable soft case meters of the 1980's made by Universal Enterprises.
If anyone has information on this particular model that they would like to share, I would appreciate it.