This Exactra 19 was part of the Exactra series that was manufactured by Texas Instruments though you wouldn't know it by looking at the front of the calculator. For some reasons, possibly marketing, TI decided to place their only identifying mark on the back cover in small lettering. The Exactra series included the 19, 20, 21, 22and 23 models and was produced starting in 1974. The Exactra 19 is one of the cheaper options in the series and only had 6 digit display.
The Exactra 19 uses 3 AA batteries as opposed to a 9v and has no external power supply as its more expensive brothers the 21 and 22 do. The Exactras aren't exactly rare and I've seen prices all over the place. One sold for $9.99 in good working condition while others have sold for over $100.
|Vintage Texas Instruments EXACTRA 20 Calculator w manual Star Wars Lightsaber|
$150.00 (1 Bid)
Time Remaining: 2d 14m
|Vtg Texas Instruments TI EXACTRA 20 Star Wars Lightsaber Bubble lens Calculator|
Time Remaining: 8d 2h 26m
Buy It Now for only: $225.00
|Rare Texas Instruments Exactra 19 Calculator Red led bubble lens|
Time Remaining: 6d 19h 45m
|Texas Instruments Exactra 21 Calculator Works Great Very good used condition|
Time Remaining: 27d 21h 37m
Buy It Now for only: $67.50
|Exactra 23 Calculator Texas Instruments TI 23 EX 23 Works Vintage|
Time Remaining: 17d 14h 32m
Buy It Now for only: $99.00