Wow I never thought much about that guitar, I assumed it was cheap guitar.The video is from a European tour. In this video Hubert Is playing the same guitar @1:30 in the good ol USA. In the background is blues legend "Son House" and he's drunk and being an ass and the "Wolf" is pullin that twenty out to make point. Look at how that harmonica is buried in Howlin Wolfs hand
I'll take a stab at your question Jimmy Page ?