It appears to be Model No. 2282 (Code Word Mead), 150 Volts. A voltmeter specially designed for use on dynamo switchboards.Marble Base Dimensions: 10-1/2 in x 6 in x 7/8 in. Brass Housing Dimensions: 6-7/8 in. The brass housing contains its original internal components, volt scale, pointer arrow, and clear glass cover plate. Raised metal lettering, with b. Note the original marble base, has a crack line that appears to have been repaired previously. There are two other examples in the MIT Museum of Science & Technology collection (Item numbers IN-0464 & IN-0465 in their webmuseum site).
This item is in the category "Antiques\Science & Medicine (Pre-1930)\Engineering". The seller is "kjam3779" and is located in this country: US.
This item can be shipped to United States.