Its a 4 pole contactor.
There is no diagram needed, just wire supply voltage into the top terminals, just use any 2.
Wire your load to the bottom terminals that are straight down from the top ones you wired to.
The 110v, and it is 110v coil I checked, gets wired to the 2 screw terminals on the bottom by themselves.
There should be no problem using an obsolete/old relay as long as its in good shape. just watch for buzzing or any real heat buildup.
10s of thousands of these very same relays are in use everyday.