Need Help - ID this Prestolite distributor

I am having difficulties deciphering the numbers on this cast iron, cable drive Prestolite distributor. It has the same cast iron housing and attributes as one of my 1968 Race Hemi units, but I do not have a breakdown of Prestolite tag numbers. (Does not appear to have a Chrysler number on it.)

H 879 (87th day of 1969?)

E0 17819 2B

Can anyone assist with deciphering the numbers? I am going to ultimately be selling, so want to correctly represent it.

Thanks in advance.

Being that it has the o ring seal,69 would be correct,with the tag numbers my best guess would be a marine unit.