Interesting mechanical calculator made by Busicom in Japan circa 1965. A fascinating piece of history from the period shortly before computers made machines like these redundant..

The '21" in the model name 'HL-21' appears to relate to the 21-digit accumulator register.

Appears to be in good condition but is untested.

410 mm x 164 mm, 130 mm (16.5" x 6.5" x 5"), 4 Kg (9 lbs.).