And more...
Fruehauf trailer.
https://www.kijiji.ca/v-cars-other/s...wii/1333208852 It looks like it has the roller turntable for steering rather than the plain version used on the 2T GS trailer. I've seen the roller version on the Brake Grinding and Press trailer, not sure about other uses. Also looks likely to have been plain impact brakes rather than boosted. ANd the towing eye has been replaced with a later version so likely the master cylinder from the brake system may also be removed.