Vintage early model AD-378 Hastings piston ring/compression testor. Manufacturered by Stromberg Motoscope Corp. Chicago. Very cool old piece does work but ultimately leaks down slowly. See pics for physical condition.

What you see is what you get, so please look the pictures over and judge for yourself! AS WITH ANY ITEMS, NO RETURNS ACCEPTED. Please allow a couple of days to get items to the post office. Please let us know if you have any questions, and thanks for looking!