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 5915-01-067-0954
NSN 5855-01-105-7793
NSN 5925-01-366-3568
NSN 4140-00-176-4369
NSN 2925-01-519-1707
NSN 5930-01-579-6815
NSN 5999-01-095-7913
NSN 6105-01-424-3933
NSN 5925-01-285-0396
NSN 5990-00-242-3754
NSN 5905-01-219-7785
NSN 6610-00-164-1510