Texas Instruments TI-55-II LCD

Serial number RCI 44 83: 44th week, 1983, Rieti, Italy
Accessories Plastic pouch

TI-55II Bedienungsanleitung (German), dated 1981

Original cardboard box and plastic insert
Condition Excellent! Keys are pretty hard to press and not always make good contact.
Repairs, Comments
Acquired 11.3.2003

Serial number RCI 1684: 16th week, 1984, Rieti, Italy
Accessories Plastic pouch
Condition Absolutely excellent!
Repairs, Comments
Acquired 21.9.2004, courtesy of Karl J÷bstl
Type, Precision, Input mode Scientific, 8 BCD digits, exponent ▒99, Algebraic
Programmable Yes, keystrokes
Performance Index
Memory ?, permanent memory
Display 8 digit 7 segment black&white LCD plus separate sign, separate 2 digit smaller LCD plus sign for exponent. 
Special features
Original Pricing, Production 1981 ($40)
Batteries 2x small button sized cells
Dimensions Length 14.6cm, Width 7.8cm, Height 2.4cm
Links Datamath Museum
Comment The keys of the II series were terrible and hardly made any contact.
Apparently, this issue was resolved in the III series.
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