Artifact Details

Title

Madas Calculator

Catalog Number

102627157

Type

Still Image

Identifying Numbers

Other number #518 Verso pencil

Dimensions

overall: 4 in x 5 in

Description

Black and white image of a MADAS Calculator. A long rectangular box with across the top a series of round windows with numbers showing.
To the right are 8 rectangular holes each with 10 noptches and a push slide, There are slides for addition, multiplication, subtraction and division.
Printed on box: MADAS Pat Jahnz U.S.A. P# DEC. 16th, 1913 D.R.P. etc.

Category

Photograph

Lot Number

X7413.2015