Voltage Regulator Question

[southallb]

Ammeter doing the bounce on last flight (normally real steady). Volt meter normally runs 13.9 -14.2, it got up to 14.7...figure the voltage regulator starting to go. Tonight Battery showed 12.7 volts and 12.5 at cigarette lighter.
Checked connections tonight at master switch and alternator. All connections look clean and feel tight. Wiring diagram for my serial number shows an overvoltage relay, but in tracing the wires, I didnt see it. Here is pic of VR. Red wire to master switch, Black wire to ground, blue wire to field on alternator. Original VR?

Thanks

 

[Ray93J]

 

[philiplane]

 

[Tweety]

 

[southallb]

 

[southallb]

 

[magman]

 

[flyguydon]

 

[southallb]

 

[southallb]