Description:

Vintage AC Sparks Volts Gauge - PRICED TO SELL!

Vintage AC Spark Plug Voltmeter – 1958–1966 GM Accessory – Battery/Charge Gauge

For sale is a vintage AC Spark Plug voltmeter, correct for GM vehicles from 1958 through 1966. This gauge features the classic AC color‑band layout with BATT, CHG, and high‑charge zones, and is ideal for period‑correct restorations of Chevrolet, Pontiac, Oldsmobile, Buick, Cadillac, and GMC trucks.

Perfect for under‑dash accessory panels, Corvette consoles, or any GM 12‑volt vehicle needing authentic AC instrumentation.

Applications: ✔ 1958–1966 Chevrolet, Pontiac, Oldsmobile, Buick ✔ 1958–1966 Cadillac ✔ 1960–1966 GMC Trucks ✔ Corvair, Corvette, Nova, Impala, etc.

AC Spark Plug “Battery/Charge Volts” Gauge

Branding: AC SPARK PLUG Scale: 10–16 volts Zones: BATT (red), CHG (green), high‑charge (blue) Diameter: ≈2 inches (panel‑mount accessory size)

What this gauge actually is

A GM‑approved AC Spark Plug accessory voltmeter, sold through:

• GM dealerships

• AC‑Delco accessory catalogs

• Independent speed shops

This is not a universal aftermarket gauge — it is AC Spark Plug division, which dates it precisely.

📌 YEARS OF MANUFACTURE

AC Spark Plug branded gauges were produced before AC‑Delco branding, which began transitioning in the late 1960s.

Your gauge’s face style, color banding, and typography match the 1958–1966 AC accessory era.

Confirmed production window:

1958–1966

📌 VEHICLE APPLICATIONS

This gauge was designed as a dealer‑installed or owner‑installed accessory for ANY 12‑volt GM vehicle of the era.

Fits the following GM vehicles (factory‑correct accessory):

Chevrolet (1958–1966)

• Impala / Bel Air / Biscayne

• Corvette

• Nova / Chevy II

• Corvair

• Trucks (C/K series)

Pontiac (1958–1966)

• Catalina / Bonneville

• Tempest / LeMans

• Grand Prix

Oldsmobile (1958–1966)

• 88 / 98

• F‑85 / Cutlass

Buick (1958–1966)

• LeSabre / Electra / Wildcat

• Skylark

Cadillac (1958–1966)

All models

GMC Trucks (1960–1966)

All 12‑volt models

📌 Why these years?

• AC Spark Plug branding ended mid‑1960s

• 12‑volt systems became universal in GM by 1958

• The color‑band “BATT / CHG” style matches late‑50s/early‑60s GM accessory gauges

• The 2‑inch diameter matches GM dealer accessory panels

This gauge is period‑correct for any 1958–1966 GM restoration.

🔧 FUNCTION

This voltmeter monitors:

• Battery resting voltage

• Generator/alternator charging output

• Over‑charge conditions

It was commonly mounted:

• Under‑dash accessory panels

• Corvette center console

• Truck dash add‑on pods

• Dealer‑installed gauge clusters

NOTE - UNTESTED AND ZERO GUARANTEES -  

LOCATION - GAUGE BIN