Beautiful 1948 Selmer Super Action (SBA) alto, recently overhauled.
Vintage relacquer, very nice kind of honey colour. New chocolate roo pads.
The SBA was introduced as a follow on to the balanced action. It has a neck designed to be slightly brighter and the more comfortable offset right hand stack keys.
This was the forerunner to the MKVI so is a kind of transition between BA and Mark VI. A very highly sought after instrument.