Unisonic 21 © 1977 Unisonic.
A dedicated blackjack game device. The player starts with a starting stake and must try to increase it by getting card combinations worth as close to 21 without going over. The player can make insurance bets, double down and split pairs.
An arithmetic calculator with 12 digits precision and algebraic logic. It has 4 functions, 25 keys, and a VFD (vacuum fluorescent) display. The power source is 3xC. The calculator can be switched between calculator and game modes. In later models the display fascia is designed to suggest a Blackjack table.
These are Blackjack games/calculators and carry the 'Jimmy the Greek' branding (named after the American sports commentator and Las Vegas bookmaker Jimmy Snyder).