I think the 73M stands for mixed config and 73S is "seats"
as in all seat configuration.
746 is parked at Mojave. Search photos for "Alaska Airlines"
and you will see it there....sort of sad, but time marches on.
It is no longer BP
/ARCO...the latest merger/buy/conglomeration
is "Conoco/Phillips". At any rate, sometime in June the contract will
no longer be Alaska's. I believe that Northern Air Cargo is taking over.
Those 2 737-200s are not combis...they are all passenger 200s leased
from Braathens/SAFE (spelling?) from Norway.