Not sure but they were made. I have quite a number of Dial set Compurs but non that small, I have two smaller AGC shutters one with a 135mm Voigtlander lens, I think f6.8.
They'll have been on smaller German Avus style metal plate cameras, 6.5x9 and slow lenses on maybe the odd 9x12 cameras, also 6x9 and smaller folding roll film cameras. Anyway slow lenses 135mm max FL. more likely 120mm, 105mm and smaller.