Mills Golden Falls 3-reelers are certainly not rare - - but finding one in minty-fresh, unmolested condition can be uncommon for sure!
Here's a recent acquisition: It's a 100% original and all intact (cash box, back door, all labels, matching locks and key) that was originally in service in a VFW down in SoCal.
From what I was told, the machine was in service after WWII up until the early 50s, and then (along with a few other slots) - got "wrapped up" and put in storage.
Well - the machine sat "asleep" for about 60 years!
It clearly didn't see much service when it was in the club - - as the Jackpot meter reads 00070 !!!
Mechanism is minty-fresh, and after some lubrication, the machine plays like a dream.
I think it's neat when these more commodity-like machines can be seen in their original state.
ENJOY