Calculators Help Identifying this old calculator EACA P-1104A

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The discussion revolves around identifying an old calculator from the 1970s or 1980s, which lacks identifying marks except for a circuit board part number, EACA P-1104A. The calculator appears to have been modified for a project, complicating identification. Unique keys labeled "S.T." and "A.T." are noted, with suggestions that "T" might represent a total value, while "A.T." could relate to adding to this total, and "S.T." might involve subtraction or storage functions. The "CE" key likely stands for clear entry.
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Hey guys,

New to the board, hoping someone can help me.

I am trying to identify what I believe to be the face of a very old calculator, circa 70's or 80's. Unfortunately it was butchered by someone for a project and there's no identifying marks, except for a part number on a circuit board on the back - EACA P-1104A.

If anyone can help, it would be appreciated. It looks like it had some sort of speaker and I've never seen keys for "S.T." or "A.T." on a calculator before.

DSCF5195_zpsc9f26a27.jpg


Joe
 
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Don't know the calculator, but the "T" probably returns a value from "T", AT may be add to "T" or add "T", ST could be subtact from "T" or store into "T". "T" is probably some form of a total. CE os clear entry.
 

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