Autotrol Turbine used in Valves with Electronic Demand Regeneration Timers.
Used with 460 and 460i and 960 and Technetics 1000.
Newer PN 1033057.

If your electronic timer assembly water flow light does not blink,
Then the meter turbine is either not spinning and needs to be cleaned,
Or the magnets have deteriorated and the turbine requires replacement.