This is your standard run of the mill "Over/Under" coin door, either made by CoinCo or Happ Controls.
These were used on most Atari cabinets and a few other ones. This one is rather plain on the front (no fancy bevels where a logo would sit, eg. "Gottlieb" on a Qbert door".
There is nothing special about this door at all, in fact it is in horrendous shape. Needs a good sanding/sandblasting, and repainting first of all.
1) Any coin mech will work on this. They're standard
2) Any lock will work on this.. 7/8" I believe. The top and bottom have a lock hole.