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 5950-00-099-9612
NSN 5835-01-440-5391
NSN 5855-00-247-7219
NSN 6135-01-319-5567
NSN 6110-01-165-1669
NSN 5960-01-263-0649
NSN 6320-00-646-3311
NSN 5960-01-371-9143
NSN 5950-00-842-3551
NSN 5920-01-343-2769
NSN 5925-00-009-3280
NSN 5930-01-063-9175