Aircraft Part Indicator Panel 47529

This item was purchased from an aviation surplus sale. It is also marked, "77 181 47529". I do not know the history of it. It is in good cosmetic condition. It is not tagged as to the condition status or the aircraft type. It measures about 6 9/16" long by about 1 3/16" tall. The lights that are installed on it at this time are marked, "VAC, ALT, OIL". I am not able to test it. It only comes with what is shown in the pictures.

S329-16 d