Type 1

Type 2

Sinclair Oxford 300 (probably early style)

Display is 8 digits, red LED.

Type 1, sharp cornered case.

4-function, %, memory.

9v (PP3 battery).

73 x 155 x 34 mm (2.9 x 6.1 x 1.3 ins).

Made in England.

Sinclair Oxford 300 (probably late style)

Display is 8 digits, green fluorescent.

Type 2, rounded cornered case.

4-function, %, memory.

9v (PP3 battery).

73 x 155 x 34 mm (2.9 x 6.1 x 1.3 ins).

Made in England.

The degrees/radians selection switch is in the unusual position on the top end of the calculator.

Oxford 300 type 1 with box and operating instructions.

Sinclair models