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 6130-01-354-9306
NSN 6650-01-232-4243
NSN 5915-01-477-8641
NSN 5975-01-502-9662
NSN 5855-01-351-2541
NSN 5895-00-222-1658
NSN 6610-01-519-0997
NSN 6645-00-845-1071
NSN 5996-00-636-4849
NSN 5920-00-829-3634
NSN 6150-01-461-8949
NSN 6105-01-268-2290