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 6610-01-146-0331
NSN 5915-01-115-9320
NSN 5910-01-525-7356
NSN 5945-01-080-7043
NSN 6610-01-515-7869
NSN 6320-01-125-3361
NSN 5835-01-200-7153
NSN 6610-00-841-8221
NSN 5999-01-432-5004
NSN 5925-01-082-0591
NSN 6135-01-633-8502
NSN 5996-01-346-8809