In this Guitar World article detailing the techniques used by James Hetfield to record Sad But True, it says:

"Further depth and texture was added by overdubbing a Jerry Jones baritone tuned an octave lower than the guitar, while additional overdubs consisted solely of muted string “chuks” to enhance the percussiveness of the attack."

The article then goes on to specify the exact guitar used was a, "Jerry Jones Danelectro Longhorn baritone copy (bridge pickup)."

In a photo featured on Ask Zac, Brad Paisley is shown using a Jerry Jones Longhorn 6-String Bass.

Used on "Hollow Bones, Pt. 1" and "Hollow Bones, Pt. 2", as stated in this Total Guitar interview.

I used that baritone on the title track parts one and two. There was one Dave [Cobb] had hanging up in the control room; a really cool Jerry Jones Longhorn. So it was really bright with the lipstick pickups. Technically a really ugly guitar and it was orange, the pressed board and strange shape… but it was still cool. I think it’s really groovy actually – it’s ugly awesome! I like that you can hear on Part 1 it’s obviously just gobs of fuzz and gain, and then on Hollow Bones Part 2 you can hear that same guitar really cleaned up. A baritone cleaned up really adds more of a Bass VI feel because it’s tuned A to A, so it’s not quite as much a baritone as it is a Bass VI because of the tuning. It’s very almost spaghetti western when it’s very, very clean like that – really cool.

This Jerry Jones Baritone was owned by legendary rockabilly guitarist Brian Setzer

Listed among Alderete's basses in this June 8, 2017 Premier Guitar interview.

Basses

Goya Panther

Warwick Jonas Hellborg Signature 31” scale

Kala U-Bass (fretless)

Jerry Jones Longhorn Bass6

Landscape Archtop ABP-1 Hollowbody (fretless)

1962 reissue 32” Fender Jazz Bass (only available in Japan) modified with Hipshot Bass Xtender and Hipshot bridge

1971 Fender Fretless P bass modified with an added Bartolini J-Bass pickup, Starz Guitarz bronze bridge, and Hipshot Bass Xtender

Fender Custom Shop “Raider” P bass

The Jerry Jones Baritone guitar can be seen to the right of Chris' Forq recording setup.

Here Bent holds a rare 6-string Jerry Jones (tuned in baritone "B")

In this photo, which partially shows Plati's guitar rig, one of the items that can be seen is the Jerry Jones Longhorn 6-String bass.

Brent Rowan has stated that if he were to go on tour with Josh Turner, one of the instruments he would bring is his Jerry Jones Longhorn 6-String Bass, as mentioned in an article by Zac Childs for Vintage Guitar® magazine.