I may be the only slot collector who didn't know this - - - - - - but picked up a nice all-origial Mills Castle Front few weeks ago. I have had several Castle Fronts before but all were double jackpot early models. This Castle Front is serial 392,230 which places it in 1936 era. Original back door and paper has 1937 date. Assumed it was the single jackpot model that Mills transitioned to - that Dick Bueschel describes in Illustrated Slots - Volume 2. But when I pulled the jackpot to clean it up - found that this is actually the double jackpot model with a Mills insert (MLB-5398) filling the reserve jackpot window. I can remove Mills plate to convert back to the two visible jackpots if I want. Hummmm - I didn't know that. Wonder if Mills made this as a transition option before they made the single JP model change? Fascinating hobby we have!
Flip