This product is the AccuSpark ACU105-HC, a 3-Ohm Ignition coil with included mounting bracket.
 
This coil is suitable for use on classic cars operating at 12v - without the need for a ballast resistor.
 
Due to the solid rosin core, this device can be mounted in any orientation without risk of leakage or overheating.
 
Compatible with all standard point types and most electronic ignition systems.
 
This product is supplied with a 5-year manufacturer warranty.
 
This product is depicted fitted onto a classic Jaguar MKII, after a 12V negative earth conversion.