The HP-41C series are programmable, expandable, continuous memory handheld RPN calculators made by Hewlett-Packard from 1979 to 1990. The original model, HP-41C, was the first of its kind to offer alphanumeric display capabilities. Later came the HP-41CV, with 4 times the memory space.

This is a very good sample, perfectly working. Comes with all port covers, the side cover and the battery holder in HP Multijet 3D-printed The Calculator Store version.

Set of pieces needed to repair successfully the lower posts of HP41C, 41CV and 41CX full nut calculators, including zebra connectors, lower post part, and keyboard support for clothes' pegs to protect the keyboard

HP41c side cover.

HP41c back port cover - 3D, new - set of 4.

HP41CL with the latest version of Systemyde circuit

Battery cover for HP12C (for 3 LR44 battery original model)

Original HP17bII calculator. Excellent state. Original cover. Works with both Algebraic and RPN

sold out

Original HP17bII calculator. Excellent state. Original cover. Includes English manual. Works with both Algebraic and RPN

Rare BLACK colour - see pictures compared with the normal one

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The HP-18C was HP's first RPL-based calculator even though this model was not user programmable. The user did have a solver (another HP first) available, and is very similar to the HP19BII, but missing RPN logic.

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This calculator was the intermediate step between the current HP 17bII and the old, Pioneer-style HP 17bII. Main differences with the original are increased memory (up to 28 kb), and the currency exchange menu. There is as well the "key feel": while both have good tactile feedback and never miss a key, some called "hollow" the keyboard touch of the 17bII+

The calculator is in perfect shape, with some dust specs in the screen (already there when I bought it). However, the pouch is a little bit "battered" - see enclosed pictures.

HP Surveying module - tested

Adhesive circuit for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. Shipping included in price.

HP Original charger in excellent shape, valid for HP41c, HP67, HP92, HP97, and printers HP82162A (HP-IL) and HP82143A

Extended Memory for HP41c, HP41cv and HP41cx calculators 

Memory for HP41c calculators (64 registers)

At its time, it was the pinnacle of financial calculators. Its 4 lines made it much more user friendly than its smaller sibling, the HP 17bii

The bII version handled RPN (while the 19b and 18c did not)

This is the rare, sought after back door model (see pictures). Comes with an excellent User Manual

The HP-12C is HP's longest and best-selling product, in continual production since its introduction in 1981. Due to its simple operation for key financial calculations, the calculator long ago became the de facto standard among financial professionals – for example, most investment banks issue HP-12Cs to the members of each incoming class of its investment banking analysts and associates.

This unit is USED and it is in good condition

Installation and set up of HP41CL module in your HP41C, CV or CX

HP82104A Card Reader for HP41c family with manual

Assembled module for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. Shipping included in price for EU customers.

New price: cheaper circuit translating to 10% lower price!

Original HP17bII calculator. Excellent state. Original cover, box and manual. Works with both Algebraic and RPN

sold out

Full-nut processor - please select C or CV type, or installation in your machine

HP41c back port cover - original and used.

Zebra Holder to keep the elastomeric zebra connectors in the contacts between main board and processor circuit in the HP41c calculator family, full nut versions.

Stat-Math module, with quick guides

LR44 battery for calculators of Voyager series (HP10c, HP11c, HP12c old, HP15c and HP16c) and Pioneer series (HP10b, HP17bII, HP42s, HP27s)

Pioneer series battery cover: HP10b, HP14b, HP17bII, HP42s, HP27s,HP22s, HP32sII

Math Module for HP41c

Financial Pac for HP41c calculators 

Navigation Pac for HP41c calculators 

Battery cover for HP17BII  (for 3 LR44 battery original model)

Battery cover for HP17bII HP32s HP42s t (for 3 LR44 battery original model)

Adhesive black silicone feet for HP41c HP41cv HP41cx calculators

Aviation Pac for HP41c calculators 

Battery cover for HP12C (for 2 CR2032 battery model)

ROM PAc for HP 85 computer series

Time module Manual - English