Aircraft Part Beech 99 Printed Circuit Board 99-364029

This item was purchased from an aviation surplus sale. I do not know the history of it. It is in good cosmetic condition. It is tagged, "Model/Type B99, N199SD". It measures about 9 1/2" wide x 5 5/8" tall. I am not able to test it. It only comes with what is shown in the pictures.

S87-54 d