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Model # HR 20 Official Casio calculator

Here are the diagrams and repair parts for Official Casio HR 20 calculator, as well as links to manuals and error code tables, if available.

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HR 20 Calculator
Unknown Brand Name #834 Printer Ribbon NR-80

#NI

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Unknown brand name #834 printer ribbon

Part #NR-80

The manufacturer no longer makes this part, and there's no substitute part

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