Has anyone here ever seen a sheet metal brake like this: http://www.linghunt.com/Equipment/Mystery%20Brake.JPG

Other than the dealer plaque (Montague-Harris) on the right side of the apron, there is no identifying signage or label anywhere on this. As shown in the pic, there appears to be something on both sides cast into the upper frame that looks like an "S" on top of a "T" but that's it. I've sent the pic to a few machinery dealers but they've never seen this type or model of brake.

It may be more-or-less obvious, but the clamping of the sheet is done by the vertical fingers via the handle at the right side. Then, as in a conventional finger brake, the apron is raised using the two handles but in this machine, the fingers tilt back at 1/2 the rate of the apron so the the fingers are always bisecting the bend angle.

I'd love to know who made this and what this type of brake is called. It's been bugging me for years. I have made sense of most of the adjustments but there is one linkage that has me scratching my head.

Thanks in advance for any help!

-Joepy