I can't see completely but looks like the Series I/Ia action on the alto. (The B/Bb "axle" is on the bell, right?).
The tenor looks like the "modern" action(Series II), with the B/Bb on long rods/axles that run from the table down to a post on the body. (ala Selmer) Regardless, that's some serious Bling. Any thoughts as to how your tenor compares to other S20s?
They both have the "modern" action left to right swinging spatula keys. I actually traded a S20 316 and some extra for the tenor. The S20 had a more raucous sound, and the intonation was less locked in, but the action was higher. This tenor is dead on. I've recorded it many times and the producers sometimes insist on auto-tuning. Most of the time, it's dead on. The tone is more versatile than the S20. With my Berg 130/0/SMS, I can hang and be heard over a Marshall cab. At shows, I usually see the soundman jumping for the pre when my solo starts, and I'm back about a foot. With my 103 TK Norberto, it's totally jazz.
The alto is a bit more unforgiving. Key height is higher than I'd like. Intonation is great until I get excited. The low end on both horns is incredible. I like playing the alto, but I had a Series I that was the King tonally. But it had lower key height. I will get this one lowered soon and I think it will be perfect.
And the case for the alto is PRISTINE!!