That's the same KM that Brad has and it's similar to the one Kelly recovered.  It looks brand new. 

Norge solved the snag issue by having a totally flat small port, totally flushed and planed against the enamel tub, while the KM's moved their ports under the agi. 

But in truth I think CU pulled that invented flaw out of their butts, and blew smoke up ours, since most if not all early machines had the open port which they reviewed without protesting. Then suddenly,

a few years later....Oh, oh oh ! A pox on those nasty open ports, etc. Interesting that Easy had the under skirt ports very early, on both  the Spindriers and the wringers, except for the 3 bell rotating plunger agitators.

The neat thing about the concealed port is that you can drain while wringing or doing underflow rinsing and not have the clothing stop and start the drain flow over and over as an item gets sucked against the port then knocked out by the agitator till the next item gets pulled into the port's current. Fun for a while then not, especially on the Norge's famously advertised "DEEP RINSE." Always got a big kick out of that one. You fill the tub with cleane rinse water,  hook the hose over the tub, engage the pump & agitator, and presto, the deep Norge rinse, aka, much ado about nothing. Partial credit for inventiveness, even if it's not too effective, but it is amusing and original.