Caille coin-operated Spirometer Lung Strength Machine c1896, 11″w x 5″d x 18″h
http://live.vcaauction.com/5-Cent-Caille-Spirometer-Lung-Strength-Machine-c1896_i12244964
Caille coin-operated Spirometer Lung Strength Machine c1896, 11″w x 5″d x 18″h
http://live.vcaauction.com/5-Cent-Caille-Spirometer-Lung-Strength-Machine-c1896_i12244964