Introduction

Rockwell-Anita Calculators
Rockwell 21R
Rockwell 21R

Rockwell 21R.

9v (PP3).

Display is 8 digits, red LED.

Four function, %, memory.

Chip is Rockwell A5300PD, here date coded mid-1975.

76 x 153 x 23 mm (3.0" x 6.0" x 0.9").

Made in Great Britain, at the former Sumlock-Anita factory in Portsmouth.
Inside

Inside, showing the circuit board. The LED module with the moulded-in lenses is towards the top, while the Rockwell integrated circuit is towards the bottom.
Home
Introduction
Origins of Bell Punch Co.
Mechanical Calculator Days
National Calculating Service
Development of Anita 1
Development of Anita 2
Anita is Launched
At work with Anita
All Change at Bell Punch
Anita Developed Further
Anita at its Zenith
The Rockwell Connection
Demise of Anita & Bell Punch
Mechanical Calculators
Early Anita Desktop Calculators
Transistors & Integrated Circuits
Anita LSI Desk Calculators
Anita Hand-held Calculators
Rockwell-Anita Calculators
Calculators made by others
Advertisements & Brochures
Operating Manuals & Materials
Company Information
A Tour of Company Sites
Summary
The Technology Explained
Operating a Comptometer
Old Sterling Currency, £sd
Links
Update Information
Getting in touch

Rockwell-Anita Calculators
811 SL
1211
1211 SL
1211P
1216
102
201
202/SR
Rockwell 20R
Rockwell 21R
Rockwell 30R

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Text & photographs copyright © 2002 - 2008 Nigel Tout, except where noted otherwise.