Accession No

2093

Brief Description

Monroe mechanical calculato, by the Calculating Machine Company, U.S.A., 1st half 20th Century

Origin

New York; USA

Maker

Calculating Machine Company

Class

calculating

Earliest Date

1900

Latest Date

1950

Inscription Date

Material

metal (at least 3 white metals); plastic (at least 2 types); cloth

Dimensions

length 400mm; breadth 470mm; height 205mm

Special Collection

Provenance

Donated by Grace Masters c/o A.F. Hoffler, England, 1975

Inscription

‘MONROE
REGISTERED TRADEMARK
CALCULATING MACHINE COMPANY
NEW YORK, U.S.A.’ (transfer on reverse)
‘MONROE
REGISTERED TRADEMARK
HIGH SPEED ADDING-CALCULATOR’ (transfer on front)

Description Notes

Black-painted white metal casing. Eight columns of plastic-covered keys for entering digits on front of instrument; also keys for ‘clear’, ‘repeat’ and ‘non-repeat’ and for changing between addition and subtraction. Metal carriage mounted behind with two displays; upper with 8 windows and 2 pointers for marking decimal points etc., lower with 16 windows and 4 pointers. Handle for carriage return. Mounted on left side of instrument is the electrical power pack with on-off switch; cloth-insulated lead (no plug).

Condition fair; complete.

References

Events