Texas-Instruments SR-50

Serial number	None, approx. 1975. Manufactured by Texas Instruments Holland B.V.
Accessories	Pouch
	Manual: Texas Instruments SR-50 (German, 84 pages)
	220V AC power supply, pretty banged-up
Condition	Cosmetically poor. Silver lining around the display partially worn off. Black paint scratched off above the square-root key. One of the battery contacts broke off and has been resoldered unprofessionally. Rubber feet are missing. Functionally ok, all display segments functioning.
Repairs, Comments	11.2.2004 Unit died away for good, possibly due to wrong power supply voltage.
Acquired	26.10.2003

Type, Precision, Input mode	Scientific, 10 BCD digits, exponent ±99, Algebraic
Programmable	No
Memory	1 storage register, not permanent.
Display	14 digit 7 segment red LED
Special features	Instructions on the back of the calculator.
Original Pricing, Production	Jan 15, 1974, $169.95.
Batteries	3x AA battery pack or external off-the-shelf DC 4.5V power supply. WARNING: The unit does not work with the Texas-Instruments 10V AC power supply if no NiCd batteries are installed.
Dimensions	Length 14.3cm, Width 8cm, Height 3.2cm
Links	Datamath museum.
Comment	This was a successful competitor to the HP-35. The keyboard has a pretty nice feeling.