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 6150-01-312-4470
NSN 5930-01-383-4934
NSN 6135-01-054-2462
NSN 5835-01-580-0446
NSN 6320-01-600-5808
NSN 5895-01-633-3939
NSN 5915-01-076-9941
NSN 5999-00-031-6130
NSN 5905-00-827-5235
NSN 6685-01-265-0634
NSN 6135-00-816-9052
NSN 5998-01-591-5033