More photos needed. A shot of the peghead, front and back, a shot of the back of the pot, and another with the resonator removed.
From that one photo, it looks British made but more photos are needed for an accurate ID.
English , often Branded " Savana " made in the 30 ' by Windsor or Rose Morris Co
'The Joy of Picking' 12 min
'GROVER FRICTION TUNER' 3 hrs