HP-35 came to life!

Original HP-35 scientific calculator.
Dead on arrival.

The problem was just the charger, that someone  tried to repair and end up with the current source and voltage sources swapped.
Swapping again the leads, the calculator came to life!

Measuring the current: 89.5 mA after power on.

Cleaning the keys and case...

Original owner printed a label sticked inside the battery compartment:
Property of Richard T. Hawkins:

 

Disassembled machine:

Assembling the parts:

ln 2.02 

e^x