General Description:
Lexan or similar translucent material, dimensions approximate 0.688 in. Square by 0.562 in. High, white color, this key cap assembly., consisting of 1 each key cap and 1 each insert k plunger has black engraving, the engraved lettering shall be opaque so lettering will appear black in a darkened room key caps are internally illuminated, this key cap is style or type j-825, a period asterisk . Asterisk is engraved on this key cap, application data, p/o key module assembly., texas instruments, inc., p/n 684579-2, end item, automated radar terminal system - arts iii, texas instruments, inc. P/n 729408-1, manufacturer data, george risk industries, inc. 24229 columbus, nebraska, p/n 2-128-004-14a
Federal Aviation Administration