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 5998-01-063-5867
NSN 6685-00-810-8380
NSN 4140-00-580-8508
NSN 5998-00-705-9941
NSN 6110-01-307-7377
NSN 5965-01-215-0993
NSN 6150-00-947-7658
NSN 7035-01-333-4203
NSN 6610-01-474-5206
NSN 2925-01-437-9041
NSN 6645-01-396-6976
NSN 5998-00-271-1555