820A Cab w 808 multicell.

[Panomaniac]

Interesting pics here:
eBay.com.hk : ALTEC LANSING OR WESTERN ELECTRIC MULTICELL HORN RARE (item 290576672766 end time Jun-23-11 19:22:22)

Interesting indeed! A cast multicell. Cast in two parts - and with a funky split throat. Cool find.