Spirometer 1885 Penny arcade Coin operated lung strength tester.
You would put in your penny and then blow into tube and it will tell you how strong your lungs are.
Mfg by National Spirometer-Dio Lewis M.D.
Oak cabinet nice original
18”tall, 11” wide and 5” deep.
$2495
Interested buyers contact us at sales@speedsportchrome.com
Contact Craig at 713-921-0235