Nice display cooler , SecoKid .
It looks as if someone had it running (or tried to) fairly recently , by the age of the t-stat .
It also appears to have had some replacement/service work on the compressor/coil unit (maybe just a 'quick' R&R job on the reefer unit MIGHT get it up & running (leak test,compressor oil test,evacuated & recharge) .
I'd guess that it's an R-12 unit , which would/might be wise to replace with a more modern compressor & coil , if the intent is to have it run for years .
One problem around here (Pacific NW) with items like yours , when used in a food-service location , is that Health Departments tend to disapprove of non-stainless steel/galvinized-lined refridgeration units .... when used only as a 'prop' (non-working) there's no problem , though .
Looks like a fair-sized project , with finding matching hardware to replace the broken/missing hinges a part of it .
I hope it finds a happy home !
Thanks for posting your item on the forum , SecoKid .