hellp what dose this NOS alternator fit

so I thought this was a 1963 Essex made alternator but I see its has Lester cast in it and Iv never Sean the plastic piece over the rear bearing so not being up on the early cars whats your thoughts ?

really interesting how the brush attaches

or it is a mounted on regulator ?

Looks like a Marine application.

Correcto...
Its for a 318, 360 Chrysler marine application..

Just my $0.02...