Vintage Hewlett Packard Model 25 Calculator -

Description

This was my dad's HP 25 programmable calculator. He probably bought it while working at Bell Laboratories in Newark NJ.
He used it for years for all kinds of engineering projects, taxes, etc.
Included with the calculator are the following items:
1. Battery case which needs new batteries
2. Original Transformer AC power source (has a switch for 115 or 230V)
3. Owners Manual
4. Applications Programs Book
5. Quick Reference Guide
6. Owner's Handbook Addendum
Currently the calculator will turn on when plugged in, but only a number 9 will light up on the LCD, so something must be wrong.
Sold As Is.