Crankcase breather

[Jeff &/or Paula <jknipe9@idt.net>]

Could someone do me a favor and list the internal components of their
Crankcase breather, top down?  I wonder if mine is assembled correctly
and/or missing anything.  From top down I see:  

1. Plastic cap
2. Spring (approx. 3cm.diameter x 4cm.length)
3. Washer-like disc (approx. 4cm diameter with 1cm hole in center)
4. Cup-shaped thingie with hole in bottom that nests into the breather
neck, held in place by lip of cup.

I would have thought a solid disc would lessen oil loss out the breather
(as it is on a BMW boxer engine), though I realize you'd then have to
fill oil through the dipstick tube.  Also, if the parts are correct as
listed, what good does the cup thing do?  The washer could just sit
where the cup does... Anyhow, something doesn't seem right but I'm
confident (hopeful? overly optimistic?) that someone here has the
answers.

Thanks,
               J.K.  '69 SB FI Auto.