The Mills Vest Pocket bell was introduced in 1938 and was in production into the '50s. It measures only 8' x 7' x 8' and weighs 15 pounds. The Vest Pocket Bell works with a push-pull slot--it has no handle. It is fully automatic and pays out like a Mystery bell, however it has no jackpot (at introduction).
The reels are covered when the machine is not in operation. The award card flips over to conceal the reels (from law enforcement, supposedly). The payout cup was also concealed by a cover.
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Micro Machines Sega
Some models produced by Mills:
Model 420 5c Fruit Reels, Gold and Blue Midget Bell
Model 420C Same as 420 except for case which is chrome finish.
Model 421 5c Cigarette reels and reward plate.
Model 421C Same as 421 with chrome case
Model 422 5c Fruit Reels, Jackpot. Same as 420 with Jackpot register and reward plate.
Model 423 1c Fruit Reels, Jackpot
Model 423C Same as 423 with chrome finish case
Model 424 1c Cigarette Reels, Jackpot
Model 424C 1c Cigarette Reels, Chrome
Model 425 5c Cigarette Reels, Jackpot
Model 425C Same as 425 with chrome finish case
Variations of color and a locking payout cup cover were Mills options.
Sega acquired rights to manufacture the Vest Pocket in the '50s.
The Mills Vest Pocket is a fully automatic bell paying the same odds as a Mystery bell, that is, 3-5-10-14-18-20. This machine is a Model 420, so it does not have a Jackpot. No model payed a Jackpot in cash, but recorded the hit on a meter with the payout being over the counter. Generally $2.50 was awarded. Some award cards showed the value of a Jackpot at 70, which included 20 coins from the machine.
The payout tube holds 40 coins. This is less than half of a full-sized bell. My Pace machine holds 90 coins in its payout tube. I have played the VP for extended periods and have not yet drained the payout tube in normal play. Even paying larger awards back to back, the machine recovers rapidly enough to pay correctly.
The VP is a 10-stop machine. Presented here are payout statistics.
| Symbol No. | Reel 1 | Reel 2 | Reel 3 |
| 1 | Cherry | Cherry | Plum |
| 2 | Orange | Lemon | Lemon |
| 3 | Cherry | Cherry | Orange |
| 4 | Plum | Lemon | Plum |
| 5 | Cherry | Plum | Bar |
| 6 | Bar | Cherry | Lemon |
| 7 | Orange | Bar | Plum |
| 8 | Cherry | Orange | Bell |
| 9 | Plum | Lemon | Lemon |
| 10 | Bell | Bell | Orange |
Mini Sega Console
Symbol Inventory Table:
Sega Mini Game List
| Symbol | Reel 1 | Reel 2 | Reel 3 |
| Lemon | 0 | 3 | 3 |
| Cherry | 4 | 3 | 0 |
| Orange | 2 | 1 | 2 |
| Plum | 2 | 1 | 3 |
| Bell | 1 | 1 | 1 |
| Bar | 1 | 1 | 1 |
| Grand Totals | 10 | 10 | 10 |
Payout Computation Chart:
Mini Sega Fruit Machine
| Award Card | Payout | No. of Ways | Coins Paid | Coins per Symbol | Percent Per Symbol |
| Bar-Bar-Bar | 20 | 1 | 20 | 20 | 2.0 |
| Bell-Bell-Bell | 18 | 1 | 18 | Bells | Bells |
| Bell-Bell-Bar | 18 | 1 | 18 | 36 | 3.6 |
| Plum-Plum-Plum | 14 | 6 | 84 | Plums | Plums |
| Plum-Plum-Bar | 14 | 2 | 28 | 112 | 11.2 |
| Orange-Orange-Orange | 10 | 4 | 40 | Oranges | Oranges |
| Orange-Oraange-Bar | 10 | 2 | 20 | 60 | 6.0 |
| Cherry-Cherry-Any | 3 | 72 | 216 | Cherries | Cherries |
| Cherry-Cherry-Lemon | 5 | 36 | 180 | ||
| Cherry-Cherry-Bell | 5 | 12 | 60 | 456 | 45.6 |
| Total Coins Paid | 684 | 68.4 |
Jackpot models add 50 coins per Jackpot. The payout increases to 73.4%
Sega Mini Amazon
Pictured below is a Vest Pocket machine with jackpot meter. The jackpot meter is near the reels.