Ignition Coil 6 Volt Twin Lead.

Twin Lead Ignition Coil 6V.
The HT Leads are 23-1/2"(590mm) long.
Mounting bolts are 3-9/16"(90mm) apart centre to centre.

Black lead : Negative 
Yellow lead : Positive
Primary resistance :1.09ohms
Secondary resistance :13-14ohms.