These archtop guitars were produced by Gretsch.
The model above is dated 1950s, with a non-original bridge.
All of the examples seen to date are fitted with Model 2000 pickups with chrome surrounds and black infills. Some examples can be seen to have both pickups the same height, before the advent of separate Bridge and Neck versions (photos copyright John Majdalani, Cream City Music).
The control knobs are clear, cylindrical, with setscrews.