Group of test assembly guidance boards affiliated with the Mariner program, including an accelerometer board by Bell Aerosystems Co. (labeled "Do Not Fly, TA Unit"), a densely packed electronics box (marked "T.A. Unit, Do Not Fly"), a "Booster Regulator" box, four weighted 'dummy' boards with hand-annotated labels (wired with nine-pin ports connected to Dale resistors), and one unweighted 'dummy' board blank. In overall very good to fine condition.
