I purchased these at an outdoor flea market 6 years ago.  The person I bought them from used to be a custodian in the plant.  He told me these were never used locker numbers.  They changed to different lockers and these were given to him

I have many of these numbers for sale.  The first number I have is #1284 through #1456.  Some numbers were sold at the flea market I attended.  If you would like a certain number let me know and I will try my best to accommodate your request.  Otherwise, I will sell the lower numbers first 

(no number 1289 ... no number 1323-1343 ... no number 1346-1453 ...