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 6645-01-495-0939
NSN 5905-00-111-2214
NSN 5905-01-144-5570
NSN 5855-01-169-4275
NSN 6320-01-425-1417
NSN 5930-00-796-0310
NSN 5935-01-283-3044
NSN 5950-00-964-9949
NSN 6135-01-354-5535
NSN 6650-01-092-8435
NSN 6135-00-444-1402
NSN 5915-01-458-5697