While tightening a 3" C-clamp today my eye fell on the lettering cast on the body.
Now I've seen manuafacturer's names, "Malleable, "Pearlitic", inch sizes and lately with metric equivalents, and for the last decade or so "CHINA" cast onto C-clamps.
But this clamp, in my estimation, wins the prize for the most useless self evident marking you could put on a C-Clamp.
I've ever encountered a non-adjustable C-clamp, except maybe ones I let get too close to a welding arc or left outside all winter.
(I'm pretty sure this clamp was made in the USA, it's marked "Chicago" and has been with me for at least 35 years.)
Jeff (Who believes you can't be too rich, too thin or own too many clamps.