Vintage Coulbourn Instruments Electronic Counter R11-25 Module Board

Vintage Coulbourn Instruments Switch Imput S22-02 Module Board

Vintage Coulbourn Instruments Contact Input Drinkometer S26-01 Module Board

Vtg Coulbourn Instruments 12 Volt Logic to 5 Volt Logic Converter Module S62-06

Vtg Coulbourn Instruments 5 Volt Logic to 12 Volt Logic Converter Module S22-06

Lot of 2 CURTIS Instruments 700 Series Solid State Digital Hour Meter Counter

KALB AC/DC COUNTER MODULE LR96702 8 Digit With Reset to Zero. Counts UP or Down

TEXAS INSTRUMENTS SN74191N SYNCHRONOUS UP/DOWN COUNTER IC