the mech I have currently installed is adjustable -- it was using tokens, but the coin door was slotted for quarters.  I'll track down my digital camera to get a picture of it.  I can at least give you the brand though...  it's a ... hmm.  =)  It was manufactured in oldham england, so sayeth the metal engravings (stern coin door, that mean anything?).  It has a sticker on it that says "coin controls <symbol> elk grove, IL, USA".  Anyhow.
  I'll be using tokens that are slightly larger than quarters.