Usually if the coin door is 9.75in wide it will have a small door coin mech.  Measures 3/4in L x 6/16in W.

Machines included are:  Vendo V-39, V-81A, V-81B and V-110.  Cavalier C-51 and C-33. VMC-27 (Table Tops too), VMC-33, VMC-33-3D. Sure Vend/Selectivend P-47, P-95, S-48, S-96.

Probably some we've missed. 

NOT FOR CAVALIER C-27 as these mechs are different.