This CRONOMAC voltmeter in 52 mm format integrates into a classic vehicle dashboard to continuously monitor the electrical voltage of the on-board circuit, with a reading range of 8 to 16 volts. It is suitable for replacing a faulty instrument or equipping a dashboard undergoing restoration. Its standardised 52 mm diameter facilitates installation in the usual housings provided for this type of instrumentation. A functional part adapted to the requirements of careful restoration.