Antique Thwing Instrument Co. Millivoltmeter No. 5807 Brass Hardware Wood Case
Untested, I don't know if this instrument is functional. The key to the locking latch is missing. The wooden case has some splits on the bottom and the handle is taped up. Looks like it belongs in a museum or Dr. Frankenstein's lab The wood case measures approximately 10-1/4" x 8-3/4" x 5-3/8". It weighs about 9lbs.
