There's a show on Youtube from the 50's, I have it on DVD also, of the boys playing what looks to be a USO show. Featured the "Little Darlin" doing his porkchop dance, and was hosted by Charlie Applewhite. There are a few songs here that I believe Josh played the bass on, and also Hylo Brown.I belive he's got nylon strings on,,I've seen early photos with guts,,those look like supernyls to me,,He was a great player,,simple as pie but had timing like no other,,bad left hand and all, Josh told me he taught him how to play the bass.
The latest dvd of the Flatt&Scruggs show includes a show from 1956 in which Josh is playing the bass,,few know that he was hired as a bass player,,and just fell into playing the Dobro,,,but he sounds good on bass too.
That bridge looks like a potato chip it is curled up so high. I am continually amazed at these basses. They were absolute workhorse in their day. Anyone that snubs their nose at an old Kay should take into consideration how these basses traveled and were played. Good golly no wonder some of them look like they were drug behind the bus instead of on the bus.