Prinztronic SR99P

3 v (2x AA batteries).

Display is 8 digits, green fluorescent in single tube.

4 functions, %, square root.

Main Integrated Circuit - NEC uPD940C (date coded H5X21M).

78 mm x 123 mm x 24 mm.

Made in Japan.
The distinctive style casing with the rounded corners on the right side is a feature of some models from the TEAL (Tokyo Electronic Applications Laboratory Ltd.) company, so this model may have been manufactured by TEAL.

About 1975.

Prinztronic models