Prinztronic C15

6 v (4x AA batteries).

Display is 6 digits, red LED, button to display 6 more less significant digits.

4-functions, fixed point (0 & 2 places of decimals).

Membrane keyboard.

80 mm x 172 mm x 22 mm (3.2" x 6.75" x 0.9").

About 1973.

Prinztronic models