Battery holder case for the Woodstock family of calculators, made with 3D printing and springs in stainless steel 304 alloy

Extended Memory for HP41c, HP41cv and HP41cx calculators 

User Manual Extended Functions/ Extended Memory

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 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.

1 Piece for repairing HP41c back cases.

This piece is for repair of HP41c back halves, specifically the support of the upper screw heads that is often damaged, and very difficult to repair in a lasting way.

Repaired back side of HP41c. It can be used in case the original backside has the screw supports broken.

HP41c side cover.

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.

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!

This piece is for repair of HP41c full nut calculator, substituting the damaged or corroded zebra connector that links the main board with the processor circuit. Pair

The HP 82143A is a thermal printer that was connected to a slot of the HP-41 series calculators. This printer was introduced with the first hp 41c. At the time, it was the first calculator that could use an external printer - in the line of endless expandability.

This unit works flawlessly and comes with a nearly complete paper roll and a new one.

4 pieces for repairing HP41c back cases.

This piece is for repair of HP41c back halves, specifically the support of the upper screw heads that is often damaged, and very difficult to repair in a lasting way.

Leather-like protective case for HP Calculators

Thermal Paper for HP calculator printers: (HP 82240a & b, HP-92 & HP-97, 82143a & HP-IL printer) single roll

We offer the flashing of new firmware for the 10bII+, 12c+, 20b and 30b.

These calculators have a port that allows the user to flash a new firmware. For that, a special cable is needed.

Time module for HP 41c/vc calcs 

HP Surveying module - tested

N.O.S. Power Supply for the HP 82240B printer. Experience how fast your printer can go - compared with running off batteries. It is a different world!

Attention - UK plug - not Schuko. For European or American users, an adapter is required

If you need to do quick calculations on the road, our compact, stylish Quick Calc calculator is ready. It's simple to use, and so small that you can keep it on your key chain, in your handbag or briefcase, or in your car.

Compact and stylish

• Use at home, in the office, or in between
• Attach to a refrigerator or metal desk or cabinet via the magnetic back
• Carry and store on a key chain, in your bag or briefcase, or in the car

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

Memory for HP41c calculators (64 registers)

Battery holder case for the HP41 family of calculators

Quad Memory for HP41c calculators (256 registers)