As differentiated by serial no. 6610a4096a1
An instrument for measuring the rate of flow of a fluid through a pipeline. This measurement is indicated on a graduated scale either by means of a float confined in a tube, or pointer connected to a vane, or piston and spring or the like. Excludes meter, fluid flow indicating, differential pressure; meter, fluid flow indicating, electromagnetic; and meter, fluid flow indicating, ultrasonic.
NSN 6150-01-612-8720
NSN 5930-01-063-7801
NSN 5835-01-529-3050
NSN 5930-00-384-0570
NSN 5895-01-313-5572
NSN 6650-00-876-0152
NSN 5975-01-583-3980
NSN 4140-01-634-0330
NSN 5935-01-171-0645
NSN 6320-01-029-4220
NSN 6150-01-083-2014
NSN 5905-01-209-0596