I'm something of a sucker for those corner clamps with two clamping screws at right angles to each other, most often sold as picture framing clamps, but useful for lots more (like holding casework together while working on it or gluing it). Mostly, these are very similar in size, but at a recent yard sale, I found out that Record, the one-time British tool firm analogous to Stanley (now a part of the Irwin multinational, with a marked decrease in quality), made, and may still make, a larger version of this clamp design, the M141, pictured below screwed to a piece of plywood (with a typical corner clamp, and a piece of shim shingle marked off in 1 inch increments, next to it for scale). This is one serious clamp: cast iron, with a capacity of 4-1/4", and a current retail price from one U.K. supplier of $61. The right angle fixed jaws are 1-1/2" high, so this is not useful for a little picture frame for that vacation shot you want to hang on the wall behind your desk at work; but it'd be just right for framing the six-foot-tall oil painting of yourself with your favorite dog to hang in the baronial hall you inherited, along with your baronetcy, when Uncle Bertie died without issue, leaving you next in line for the title. The U.K. supplier on which I found the price says, "In addition to its function as a mitre framing cramp, it has many general purpose uses and is an ideal tool for pattern makers." It'll be interesting to see how it fits into my clamping kit.
As an added attraction, I'm including a photo of an Adjustable Clamp No. 9133 adjustable-angle "corner" clamp. These aren't common in the wild: besides the two that followed me home, the only other one I've seen was broken. Adjustable still makes them, about $16. You can tell by the fact that this (and the other) is still fastened to its backing cardboard that they have limited uses.
