What the ??

[bowtie427ss]

I stand corrected Bowtie. thanks!

I think the components were shipped to Japan and boxes assembled there. This is from conversations, no written proof, caveat emptor.

It's not often that we have that opportunity(to correct you), and that wasn't really my mission per se`. I had some 604K's staring me in the face here long enough that i recognize those two screws in the throat right away.

I wonder if there were variations in the factory load?

There's a pic in Wardsweb's gallery that definitely shows a 416/515 cone and dustcap. Certainly could have been swapped in by an owner though.

EDIT: Lot of interesting results in a Google image search. Several Japanese advertisements and spec sheets that clearly show and name the 411 woofer.

But, there are several unique(not stock photos) images that show the 416/515 woofer face.