Vintage 1977 Texas Instruments TI-55 Calculator Bubble Red LED Fully Working

Description

Vintage Texas Instruments TI-55 Calculator
Manufacture Year:  1977
Made in the USA
This used Texas Instruments TI-55 Calculator is in good condition.  It shows minor signs of wear from normal usage and storage - some surface scratches.  This calculator is fully operational.  The original rechargeable battery pack is no longer produced.  The battery pack has been removed.  A modification has been made to power the calculator by a 9 volt battery.  Now this 1977 calculator is ready to be used again!  It has a cool 8 digit red bubble LED display.  The calculator will be shipped ready to use with a 9 volt battery installed.
The original black zippered case with carry loop is included.
Details:
This Texas Instruments TI-55 is a programmable calculator with 8 digits precision and algebraic logic. It has 40 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The original power source was a sealed battery pack (this calculator has now been modified to work on a 9 volt battery). The calculator was manufactured in USA.
Facts at a glance:
Feature
Value
Type:
Programmable
Keys:
40
Precision:
8
Logic:
Algebraic
Display type:
LED
Length:
145mm
Width:
80mm
Thickness:
33mm
Power Source:
Originally a sealed battery pack - converted to 9 volt battery
Country:
USA
Year introduced:
1977
The 386 Experience works to divert vintage electronics from being thrown away.   The 386 Experience exists to promote the continued use of vintage computers and electronics.  As these systems and software age,  there are fewer and fewer of them available.  Much of the software is discarded as "useless" and the hardware is thrown away for being "obsolete."  We want to rescue the software and electronics before they vanish from existence.  Computer users with knowledge of how to use and repair these systems are still around and it is our responsibility to pass this knowledge on to future generations.  There was a time when you used a typewriter to type a letter, a 8-Track tape to listen to an album, and a dial up modem to connect to the internet.  If we cannot repair a device to the original operation, we work to modify the device.  These Texas Instruments TI-55 calculators would otherwise be useless without our modification to work by 9 volt battery power.  They can be enjoyed by other generations and continued to be used for purposes that they were designed for over 40 years ago.
Check the photos in this listing for more details on the condition and features of this item.
-------------------------------------------------------------
I aim for 100% customer satisfaction on all of my transactions. If you discover a problem with your purchase, immediately contact me to resolve the problem.