A Selmer with a wrap around register key (never seen that before) and an Albert lower joint mixed with a Boehm upper? And the serials match?

The upper and lower are both clearly marked. In any case, rare bird by famous maker is the only explanation.
FYI, I took a shot at the Kohlert alto Dave posted;- aimed a little too low. Oh well, the romantic optical effects in the photos kind of put me off on a higher bid. Too many mysteries in the shadows, but it looked like a nice clarinet. Most Kohlerts are.