A Tour of Company Sites

Rockwell-Anita Calculators
Rockwell-Anita 811 SL

Rockwell Anita 811SL

Rockwell Anita 811 SL.

Power supply - AC mains.

Display is 8 digits (1 digit is not working in the machine photographed), amber gas discharge, Burroughs Pnanplex II.

4-function, %, memory.

Integrated circuit - Rockwell A1030PE.

220 mm x 168 mm x 50 mm (8.75" x 6.6" x 2").

"Made in England, Electronics Group, Rockwell International. Distributed in UK by Sumlock Anita Ltd.".

Introduced 1974.

The "SL" in the model name stands for Slim Line.


The interior of the 811 SL, showing the Panaplex II discharge display and the Rockwell chip. This machine was designed with room for rechargeable cells, top left, should a version needing them ever be required.

Grateful thanks to Ken Buckles for the opportunity to acquire this machine.

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
The Technology Explained
Operating a Comptometer
Old Sterling Currency, £sd
Update Information
Getting in touch

Rockwell-Anita Calculators

811 SL
1211 SL
Rockwell 20R
Rockwell 21R
Rockwell 30R

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Text & photographs copyright © 2002 - 2009 Nigel Tout, except where noted otherwise.