My Payphone collection

Here are my three payphones. The black rotary says "mars" on the inner workings. I do NOT know the models on each of these. Here are the "keys" that came with the green one.. I know what the t-bar is.. the other, not a clue.

Now, they are all missing a lock on the bottom side near where the coin box is... so I need to know what goes there... all three missing this.

The green one... the guy says does not ring...and I see no bells inside.. so I need to figure that out too.

Thanks for looking....