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 6240-01-368-3280
NSN 6240-01-083-0867
NSN 2925-00-241-5244
NSN 6130-01-047-9936
NSN 6645-01-191-0107
NSN 6150-00-563-9354
NSN 6610-01-419-7130
NSN 5895-01-296-8549
NSN 6130-01-587-2691
NSN 5915-00-584-3512
NSN 5925-01-542-5622
NSN 5950-00-008-1521