Western Auto Citation Handheld Electronic Calculator

This is one of a series of handheld electronic calculators manufactured by Texas Instruments and distributed by Western Auto. It has a tan plastic case and an array of twenty-four rectangular tan keys. In addition to ten digit keys and four arithmetic function keys, there are clear entry/clear, decimal point, total, STO, RCL, pi, inverse, square, square root, and change sign keys. Behind these is an eight-digit LED display. A mark between the display and the keyboard reads: W (/) A Citation. An on/off switch is on the left side and a jacket for a battery adapter on the top edge.

The back has a compartment for a battery toward the bottom. A mark below this reads: 1577 LTA. A mark in the compartment reads: TEXAS INSTRUMENTS (/) INCORPORATED (/) PAT. PEND. A mark behind the compartment reads in part: US PAT 3819921 AND OTHER PATS PENDING (/) WESTERN AUTO (/) 66-4988-3 (/) Serial No. (/) WA 0027751. Further text reads in part: Model AC 9180 Adapter available from your dealer for (/) operation on household line voltage (/) ASSEMBLED IN USA.

A black plastic sleeve almost holds the calculator. A mark on the front of it reads: Sears.

U.S. Patent No. 3819921 was granted to J. Kilby, J. Merryman, and J. H. Van Tassel on January 25, 1974, and assigned to Texas Instruments.

Compare to 1986.0988.191.

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