Vintage Calculators

Rare HP-55 calculator is in excellent condition and works perfectly!

The display lens is in good shape. HP 35 Calculator. The silver trim is worn around the ON/OFF Switch. CALCULATOR ONLY ! Calculator is. The ON/OFF Switch slides good. Tested with batteries and tested with an AC adapter.

Rare HP calculator is in near mint condition and works perfectly!

Rare early 4 banger calculator is Mint In Box and works perfectly.

Missing 16C emblem on upper right. Includes HP slip case and 3 fresh batteries. Made in USA, serial 2439A56966.

Calculator Powers on , no battery . Case is stained and dirty sell as is , not sure how to properly test functions.

HP-48GX Scientific Calculator. Up for Sale is an Good condition HP-48GX Calculator. This unit had a bad LCD. It has been disassembled and replaced with a new, high contrast BLACK LCD. very light wear on calculator body.

Ultra rare early calculator is in good condition and works perfectly.

Here is the check list for the HP-41CV calculator Wrote a short iterative program. Calculator executed it as expected. Tested and works. All tested and all acknowledge an inserted module using the CAT 2 command.

HP-42S Scientific Calculator. Up for Sale is a good condition HP-42S Calculator. I have done this on dozens of HP-42S and similar calculators. not crack in case above HP logo. light to moderate wear on calculator body, see pictures.

This is Serial No. 1504A07167. It seems to work fine when using the AC Adapter. Auctiva's FREE Counter.

The calculator is in excellent working condition and passes the internal/display and the keyboard self tests. Serial number 2518A04816 (1985). Made in USA. Fresh batteries installed.

HP 65 SCIENTIFIC CALCULATOR WITH ORIGINAL LEATHER CASE.

The calculator works perfectly, too well in fact - it no longer has the 2.02 bug, it used to belong to an employee of Hughes Aircraft and was probably used for work. Serial is unreadable outright. Inside, the calculator board is soldered to the keyboard and I did not take the machine apart further.

This is a nice and clean, working HP 25C. Serial number 1610A01271 which estimates it at 1976 week 10, Made in USA, so likely early first year of production of the 25C. The case appears uniform in color and has little in the way of irregular age yellowing.

It's in very good condition minimal usage, very close to having a mint condition, as you can see in the pictures. Made in USA. Serial number on back is 2544A75074. No reserve.

The calculator’s magnetic card reader has been refurbished and can read and write magnetic cards. Card Reader. Here is the check list for the HP-65 calculator Works well. I loaded a short program from a card and executed it.

HP 41CX Scientific Calculator is in great condition. I wiped it down but there is still a little dust in spots, other than that it is really nice. Original case and surveying module I. You can see in the last picture that the calculator currently has good batteries and turns on.

Works with adapter (not included).

The 92198 was made by Mountain Computer Corporation. It had an HP-IL interface and was used by the HP-41, HP-71 and HP-75 to output 80-column (24-row) video to a standard video monitor. As a result, the 92198 produces a relatively low resolution character cell.

Note that these are not functioning properly and are for parts / restoration / repair. Cases and paperwork pictured are included.

The display is 8 digits green "Itron" fluorescent tubes. The most obvious characteristic of the Itron display is the half-height zero digit. Also, the EL-8A calculator has a 4 prong plug-in for the AC adaptor unlike the EL-8 which has a 3 prong plug.

HP-41CV Working Calculator. HP-41C Working Calculator Case. All 4 feet on the bottom side of the calculator. A Guide for the Experienced User. HP-41C Quick Reference Guide. (00041-90328 Rev. C). Battery Case with batteries.

Takes a bit of jiggling to get the battery cover back on, since the battery box case has a small crack (see photos). Wall converter (tested: gives clean 10vAC output). Scientific Programming Calculator.

Module covers. Module ports. All tested and all acknowledge an inserted module using the CAT 2 command. Here is the check list for the HP-41C calculator Had corrosion and I cleaned it up. Wrote a short iterative program.

Model: 41C. HP - Calculator. HP Soft Zipper Carry Case Included.

The infrared module works perfectly. A port cover for the port that currently has the module inserted. This calculator works perfectly and is in excellent shape. The bottom and sides show very light signs of use.

It even includes two of the three original "Property Of" labels that allow you to identify the unit belongs to you! Apparently there were two version of this calculator. This is the "A" version which apparently had a ROM change that fixed a calculation error, making it more desirable than the flawed versions.

This model has the side battery door. See the last picture for a reference. It is in perfect working condition.

HP 67 calculator & extras. Note that it does not include an AC adapter (the reason I can't test it).

100 MSa/s sampling. Optional Printer. Compare Waveforms.

Calculator, tape recorder adaptor interface, and printer. with pouch and two manuals, from estate of civil engineer. Tested, good condition. Batteries not included.

HP-41CX Scientific Calculator. Up for Sale is an Very Good condition HP-41CX Calculator. light wear wear on calculator body. keyboard is in good to very good condition, no worn lettering or numbers. keyboard is good, see pictures.

All keys respond instantly with the classic HP bounce. very light scratches on LCD screen. keyboard bezel has scratches as shown.

Absolutely complete. Display perfect. Includes calculator. Plastic dust cover. Instructions manual. Styrofoam packing top and bottom. The calculator is completely contained within the styrofoam. Box does have some cosmetic issues to the top. One corner is split as shown. Still a very rare example of this desk scientific calculator. TEXAS INSTRUMENTS SR-20 ENGINEERING CALCULATOR FREE SHIPPING WITH INSURANCE INCLUDED.

HP 15C Scientific Calculator W/Original Sleeve Case. Good Working Condition! I strive to bring you products that you will love.

If you are a collector, you will enjoy this unit along with the manual and pouch--they make a nice set. The calculator’s magnetic card reader has been refurbished and can read and write magnetic cards.

Calculator has all the module covers missing. I was unable to test the module ports or the card reader. Here is the check list for the HP-75C calculator Wrote and executed a short integer-summation program.

In good condition! God bless you!

In good working condition. The Manual has highlighting and notes made on the pages.

Up for Sale is a Good working condition HP-75C with an AT&T (82718A) Expansion Pod. 82718A Expansion Pod. 64k RAM tested and works. POD SN 2445A04915. tested and works great. AC Adapter. SN 2316A11933.

Works great. Uses 3 AA batteries not included.

With 2 new coin batteries installed, and then reset.

W/ Original Case Made in USA Clean Working. Very clean and seems to work well. We will make every effort to. correct the situation. in the Continental USA. We make every effort to be accurate. have added new batteries.

Calculator (2x AA battery operated, not included). This is a great desk calculator for school or work. It is in excellent condition and works perfectly. slip cover.