I just bought a older Gitzo R3 (model #370) Pan-Tilt Head. The handles are the flat paddle configuration, the knobs a black plastic. The platform is rectangular, topped with cork, has a slot with a 1/4 inch bolt. I'm guessing maybe 70's or 80's vintage.
I can't find any specs on this head and I'm looking for the maximum load capacity.
I appreciate any information.