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 6145-00-295-1503
NSN 5895-00-193-0453
NSN 5930-00-051-4059
NSN 5998-01-607-1803
NSN 2925-00-962-9256
NSN 5996-01-359-7642
NSN 6320-01-366-5157
NSN 5915-00-594-7786
NSN 5925-00-820-5748
NSN 5985-01-483-5317
NSN 6130-01-394-5913
NSN 6685-01-020-7235