Burroughs Class 3 Adding Machine

This full keyboard printing adding machine is manually operated. It has a metal frame painted black, with a metal keyboard painted green. There are five columns of black and white color-coded plastic keys. The non-add, total, and subtotal keys are on the left. The repeat key is on the right. In front of the keys is a row of six number dials, under glass. These indicate the sum of numbers added. The crank on the right side operates the machine.
Behind the keyboard is the black ribbon, printing mechanism, narrow carriage, and paper tape. The tape is visible to the operator, unlike that on earlier Burroughs machines. There are six digit type bars with an additional type bar right of these that prints symbols.
The machine is marked on the back of the keyboard, with a line drawn through the letter “O”: BURROUGHS. It is marked on a metal tag at the base of the front: 3-283826. It is marked on the back (partly obscured): BURROUGHS ADDING MACHINE CO.
Compare 323588. Burroughs acquired the Pike Adding Machine Company of Orange, New Jersey, in 1909. This machine is very similar to the Pike.
date made
Burroughs Adding Machine Company
place made
United States: Michigan, Detroit
Physical Description
glass (overall material)
plastic (overall material)
metal (overall material)
paper (overall material)
overall: 25.5 cm x 28.5 cm x 50 cm; 10 1/32 in x 11 7/32 in x 19 11/16 in
ID Number
catalog number
accession number
maker number
Credit Line
Gift of Western Union Telegraph Company
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
American Enterprise
American Enterprise
Exhibition Location
National Museum of American History
Data Source
National Museum of American History


I have a Direct alternating type 3, SN A800115 Volts-85-125 cycles-25-100 amps-8 It was manufactured in 1922. It is the only electric one that I have seen.
Why does the Burroughs series 3 adding machine not have zeros in the key columns?
My dad had one of these in his store. If I remember right if you don't push a key down it defaults to zero so there is no need for one.

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