Can anyone tell me what this is? Thanks, -Crispin

 

Wow, that's a Mazda Factory Racing 12a distributor. Great find!

 

Any info you can give me on this? Looks pretty simple. No advance. Leading and trailing loom,,

 

I don't know a great deal about it as I've never owned or used one personally.

It's mentioned in the rx7 competition manual and is intended to be used with a CDI ignition system. The dizzy is breakerless and instead has a magnetic trigger with no timing advance or timing split mechanism. It's supposed to be locked at around 20 degrees BTDC when used on a peripheral ported 12a.