Eric Clapton recalls that he has owned this guitar for a long time - at least twenty years. He commented that he used this National for playing slide both at home and in recording sessions.

In this picture from Taylor's performance of Innocent at the VMA's in 2010, Taylor can be seen playing a National Duolian.

Justin's guitar tech posts this image of a National Duolian.

A good shot of this guitar appears 17 seconds into the video.

"Because I lost all of my guitars in Hurricane Sandy, I don't have as many vintage guitars. Right now, my dad's Martin is the oldest, being built in 1953. I used to have a 1929 National Duolian, that was the oldest I've ever owned. I also had a couple from the 40s."

The National Duolian is from 1931 and has the Lollar pickup, which was installed by the Bryant himself, according to the Premier Guitar's rig rundown.

Around the time of his albums "Taj Mahal" "The Natch'al Blues" and "Giant Step / De Ole Folks at Home" Taj played a National Duolian resonator guitar: "I was playing a National Duolian, and I played banjo on “Farther on Down the Road.” When I was in college, a guy showed me around on the instrument. Eventually, I borrowed a banjo, locked myself in my house trailer for a weekend with a bottle of Jack Daniels, and went at it [laughs]. When I opened the door and came up for air, I could play!" (https://www.guitarplayer.com/miscellaneous/blues-legend-taj-mahal-talks-on-his-first-40-years-in-the-business)

Son House is pictured with his National Duolian resonator guitar in a user-uploaded photo on Findagrave.

During this interview, Luther said he "also has a 1930s 12-fret, slothead National Duolian".

According to Immergluck's official website, he uses the 1931 National Duolian resonator guitar.

Miguel Talavera uses a National Duolian "Hula Blues" model resonator guitar, made in the USA. This particular guitar features a Highlander pickup from 1996 and is inspired by the 1930s vintage models. The ownership is evidenced by a user-uploaded photo.

Blind Boy Fuller is seen with a National Duolian resonator guitar in a user-uploaded photo on Themortonreport.