This is a set of ignition modules for a 360 degree carb model Hinckley Bonneville. All are based on a Triumph Performance Stage 3 curve with a 9,000 rpm redline. They were programmed by Triumph Twin Performance in Bournemouth on the south coast of England. All work just great. They are used during dyno testing to dial in the optimum ignition curve.
Curvea are 8, 6, 4, and 2 degrees retarded, the standard curve, and 2 and 4 degrees advanced. Five 270-450 boxes just cost me $1535, so the $500 I an asking for these is a good price.