Citizen SRP-45 scientific programmable pocket calculator from 1991

Nice in metal face plate.

Pi constant displayed to 10-digits.

 

Forensic test in Degrees mode (other options are Grad and Rad).

9 sin cos tan Inv tan Inv cos Inv sin

result displayed as = 9.00001562

 

Hyperbolic functions wating to be selected.

 

Inverse functions waiting to be selected.

 

This is a low profile machine.

It suffered some abuse from previous owners trying opening the case using brute force approach.

Label in the back cover:

Citizen

LCD Display Calculator

type: SRP-45

T.M. Licenced by Citizen Watch 

Co. Ltd. Tokyo, Japan 

Japan CBM Corporation

Made in Taiwan Fabrique à Taiwan   

Processor from Sharp model LI3301A Japan 9109 B.

This calculator was made after 1991 week 09.

Battery electrolytes leakage marks in the battery terminals.

A single 200Kohm 1/8Watt pass through resistor.

The PCB references includes SR-35P.

Easy to dismantle when maintenace is required.

Care is reeded to open the case, though.