This from Dennis McGuire, Jr.:

I found this in the 1973 Rules & Regulations of the Chicago Fire Department:
” Section 47.103. Equipment to be Provided by Probationary Member.
Before assignment to a Fire Company, each probationary member shall provide himself with an approved fire helmet, a water-proof fire coat, a pair of three-quarter length boots, a pair of knee-length boots, safety innersoles or innerliners for all boots, a pair of bunking trousers, a pair of work gloves, a pair of mittens for winter wear, a flash light, an approved protective face and neck shield, and any other wearing apparel prescribed by the Chief of Training.
So it shows that even in 1973 we had bunker gear, and they had to buy all this themselves.
Dennis M.