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 6320-00-504-1214
NSN 5935-00-681-1120
NSN 7035-01-354-4318
NSN 5905-00-529-6999
NSN 5855-00-586-6255
NSN 5996-01-196-7363
NSN 5998-01-447-8579
NSN 5855-01-600-0486
NSN 7035-01-155-0153
NSN 6685-01-231-0353
NSN 7035-00-312-3055
NSN 5990-00-440-6532