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

Available again from end of May - please reserve your unit by email to sales@thecalculatorstore.com

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

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, with all port covers and no traces of rusting. Includes protective original bag, original box and German manuals.

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

sold out

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.

sold out

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.

Complete HP-85(A) Computer. The tape drive has been substituted with a QIC new drive. 2 new tapes with software are supplied + 2 new blank tapes. The rubbers of the printer have been changed as well, although there is a clear area in the printout - see picture.
All keys work well and the screen is sharp. The set includes an additional memory card of 16 bit and a rom drawer.

It includes a rare transport case -see pictures (it is "a portable computer", in a way ;-))

Time module for HP 41c/vc calcs 

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

From Wikipedia, the free enciclopedia: The HP-42S is a programmable RPN Scientific hand held calculator introduced by Hewlett Packard in 1988. It has advanced functions suitable for applications in mathematics, linear algebra, statistical analysis, computer science and others.

This unit includes user's manual (English or Spanish - your choice), vinyl case and original box with inner plastic.

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

Quad Memory for HP41c calculators (256 registers)

Parts for battery-back port module repair kit, or module assembled 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. Please choose option!

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.