That is a Seeburg model 220. Model year of 1959. It is a low end machine, in that is only hold 50 records. Unless it is fully restored, it is not worth $4000.00
As far as sound on old classic jukes go, the amps were designed for max bass, and low noise levels to cope with records that were played hundreds, if not thousands of times when the machines were out in service.
Stylus pressure specs on the Seeburgs was 3 or 4 grams, but only because of the rough service the machines were sometimes subject to when they were in use.The machines were most often not treated with care, and sometimes were abused, or even vandalized. The stylus pressure is adjusted to two grams on my 1955 V-200, and yet it still tracks even very warped records perfectly. Most "modern" turntables tracked at two- to three grams.
Watch the video of my 1955 Seeburg play the warped recording at two grams stylus pressure.