This was the first of the true QT model, manufactured between 19. Twin Jackpots, original back door, original cash box, original award card, original Mills locks front and back. is a 10-stop machine that returns from 50.6% to 73.4% to the player depending on model.1934 Mills QT 'Firebird' 5 cent. This is a very nice machine 'older restoration' 9.9 out of a 10 Blue and Yellow in color. The check would then appear to be a valid coin. Some slot players of the day would fill the center hole of the checks with lead or solder. If a vendor is attached, vends are not permitted for checks played. The machine will award payouts of checks for winning combinations for both checks and coins played. Checks are sent to the payout tube with overflow to the jackpots and cash box. Coins that are played are diverted directly to the cash box. When the lever is set for check play/payout, just the opposite occurs. If a vendor is attached, no vend is permitted when a check is played. Checks permit operation of the machine, however no payout is made for a winning combination. When the lever is set for coin play/payout, checks that are played are captured at the coin head and sent directly to the cash box. A simple lever setting sets the linkage logic to coin or check play.

Checks are coin-sized but have a washer-like hole in the middle that is used by a probe in the coin head to sense the presence of the check. This 5-cent machine jackpot would average $3.20. Perhaps this is where we get the slang term 'operating on the Q.T.' Payouts are fully automatic including double jackpots which are auto-filling. This makes for a quick hideaway of the machine in the event of a raid by law enforcement. weighs in at 36 pounds and occupies only a square foot of counter space. The action is faster than full size bells assuring more plays per minute. The QT was made for 1-cent, 5-cent, 10-cent and 25-cent play. Various fronts were made for the same integral mechanism with some models having attached mint vendors. slot machines were introduced in the mid to late '30s and enjoyed production runs until 1947.

Mills qt firebird slot machine