Here is a super nice King 4B w/ F-attachment from 1972. Yellow brass bell, the usual King “thumb-over-brace” trigger arrangement, 8.5” bell, and a great slide. The valve on 4B was ahead of its time, design-wise, and was later used on the Gen II 88H's and the Benge tenors. Comes in the original case with green interior - my favorite iteration of the King hard case. This is a great playing horn from a desirable era. $1500 includes insured shipping in the US.

Photos: https://photos.app.goo.gl/x1RH4kf5hfBwkmFJ7