Vintage JBT Model 31-FX-50 Frequency Meter (48-52 Hz) K & N put in protective sleeve right

put in protective sleeve right out of package

so bulb will need replaced

Have one in matt black on another listing

All items in great shape for the age

This came from an old Harley shop that used to race back in the 60's

Vintage JBT Model 31-FX-50 Frequency Meter (48-52 Hz) K & N put in protective sleeve rightVintage JBT Model 31 FX 50 Frequency Meter (48 52 Hz) This listing is for a genuine vintage JBT (J B T Instruments, Inc.) analog frequency meter. This gauge is a "vibrating reed" type, known for its extreme reliability in industrial settings. It is designed to measure alternating current (AC) frequency for systems operating nominally at 50 Hz, specifically within the range of 48 to 52 Hertz. It is an ideal component for monitoring legacy power