Chevy tach drive distributor ID

Got this distributor from a friend cleaning out his garage. He couldn't remember what it was from. Has no markings other than '726' stamped on the underside of the housing. The electrical connector is a 3 pin with a twist-lock. The rotor is marked with 1BK1016. The inside of the cap is marked 1BK1003.

And yea, I already Googled for 45 minutes with no luck.....

Marine application?

 

it looks aftermarket, wonder what's inside down in the bottom?

 

looks army

 

Accel made a unit with the upper bearing support. More than likely magnetic trigger below plate. Connector is pretty typical of Indy car , can am racer etc......
Chevrolet V8 for sure......

 

I'd keep it!!

 

Just what I was going to say, looks like an accel BEI.

 

you guys provided me with enough clues
Accel P/N 35100
The power of the HAMB!! thanks!!

previous owner had a Hilborn injected FED a couple decades ago

sorry the picture is huge