A US Navy precision marine barometer by W. M. Welch of Chicago Illinois, dated 1941.

Two scales graduated in inches and millibars, with rack and pinion vernier.

Length of barometer: 38 inches (97 cm).

Barometer marked: U.S. NAVY, BU. SHIPS 1941 MANUFACTURED BY W. M. WELCH MANUFACTURING COMPANY CHICAGO. ILLINOIS

Serial number: 2155

Wall mounted in a glazed brass and copper case, with carrying handle. The interior of the case has a hinged arm support and gimble joint which hold the barometer clear of the case when taking readings.

Case marked: A Sign of Quality WELCH A Mark of Service W.M WELCH SCIENTIFIC COMPANY ESTABLISHED 1880 1515 SEDGWICK ST CHICAGO

Height: 111 cm.

Width: 17 cm.

Depth: 14 cm.

Literature: W.M WELCH SCIENTIFIC COMPANY 1949 CATALOG. Page 95.

Welch Scientific Co founded in 1880 by William M Welch in Maquoketa, Iowa. In 1906 the company moved to Chicago and was incorporated as the W M Welch Manufacturing Company.