Prinztronic 400

9v (PP3 battery).

Display is 8 digits, red LED.

4 functions, %, memory.

Integrated circuit - Texas Instruments TMS0972NL, here date coded 1978.

74 x 134 x 22 mm / 3" x 5.25" x 0.9".

Made in Hong Kong.

Prinztronic models