Koaloha bridges: Some say "Koaloha," some plain

I'm looking at a Koaloha Soprano with a bridge that has two white circles on either side. I'm assuming there's a screw or something under those circles affixing the bridge to the body.

Contemporary Koalohas I see online seem to almost all have a bridge that says "KoALOHA" on 'em.

And then I see bridges with no white circles at all.

Anyone know the differences between, at least, these three types of bridge?

I think the bridge changed from a plain one to the logo one in 2010. I bought a Pikake soprano the previous year, and it had a plain bridge, no white circles.