Up for sale is a well preserved HP 33E calculator. Originally introduced by HP in 1978, this iconic "Spice" series model represents a landmark era in programmable computing. This specific unit was manufactured in the USA in 1979, blending retro engineering with that unmistakable, nostalgic 1970s aesthetic

Features a bright red LED display and uses classic HP RPN logic.

This unit is in EXCELLENT condition. The battery compartment is pristine. There is absolutely no acid corrosion.

HISTORICAL DETAILS• Serial Number: 1920A96398• Built: Mid-May 1979 (Week 20)• Country: Made in the U.S.A.

BENCH-TEST RESULTS•

Display: All red digits light up brightly. All decimal points work perfectly.

Keypad: Every single key feels crisp, highly responsive, and retains its original tactile clicky feedback

Memory: RAM writes and clears programs easily.

Math Precision: Processed complex trig loops accurately, passed all advanced logic inverses.

Cosmetic details:

Display Screen: Shows minor, typical vintage shelf wear and light surface scuffs from regular storage.

Emblem Strip: Minor, light surface scratches are present on the silver "Hewlett-Packard 33E" nameplate at the bottom.

Rubber Feet Status: The main rubber feet on the calculator body are intact and perfect, though the specific feet on the battery door itself are missing.

Box and Library Details:

Box Condition: Sturdy overall with protective tape applied around the outer edges from a previous owner.

Library Markings: Includes official library stamps on the box exterior on the front t and side.

Library Pouch: Attached inside under the box lid with the original card insert.

Manual details: both of the manuals have library stamps on them. The spiral bound owners handbook and programming guide is missing the back cover

The solving problems with your Hewlett-Packard calculator has a binding issue at page 31 to 34. Those pages are attached to each other, but not attached to the book itself. This can be easily fixed.

WHAT IS INCLUDEDHP-33E Calculator(Excellent condition)

Original Retail Box (Ex-library item with stamps)

Original Spiral Manual (Ex-library markings)

Solving Problems Booklet (Ex-library markings)

⚠️ IMPORTANT NOTES• NO BATTERY: Does not come with a battery pack. Replacements are easy to find on eBay.

NO CHARGER / NO CASE: Does not come with wall adapter or case.

SAFETY WARNING: Always install a good battery pack before plugging an AC adapter into the wall. Running it without a battery buffer can damage circuits.