Accession No

6147

Brief Description

Hamann Manus R, mechanical calculator, 1953 (c)

Origin

Berlin, Germany

Maker

Hamann Manus and Deutsches Telephon Werke

Class

calculating

Earliest Date

1953

Latest Date

1959

Inscription Date

Material

Metal; paper; plastic

Dimensions

Length 305mm; breadth 230mm; height 167mm

Special Collection

Hookham collection

Provenance

Donated on or before 1987.

Inscription

‘De Te We
hamann
Manus R’ (top)
‘19 SIDNEY ST.
W. HEFFER
& SONS. LTD
CAMBRIDGE’ (paper label stuck to top)

Description Notes

Green-painted metal Hamann Manus R, built by Deutsches Telephon Werke, Berlin.

Carries 9 columns for entering numbers, with plastic-coated metal levers; display above for number set, with plastic pointers to mark decimal point and thousands. Numbers are entered onto output by crank handle on right side of instrument. Lower read-out carries 21 digits in all, the leftmost eight of which are separated from the rest; three plastic pointers for decimal point, etc. White metal levers for resetting instrument to zero, on right hand side. Switch for choosing addition or subtraction.
On paper-covered cardboard base, with domed paper-covered card cover with flip catch and metal carrying handle.

Condition good; complete.

References

Events