Besides being pretty, one of the things I like about mine is how it is numbered. Often times you want a degree measurement that is before or after bottom dead center. The way mine is numbered allows you to more easily obtain those type measurements.

For those interested, the airplane is my dearly departed CMP Christen Eagle biplane, and the pic was taken at an estuary near San Carlos, Guaymas, Mexico. It died when pieces from a supposedly gasoline proof fuel stopper caused the engine to quit, just as I was trying to cross a concrete block wall on short final to land at a short strip on a windy day. Wasn't much left...

AV8TOR