51 lx 8 months ago Sam, when you have the guitar repaired, make sure that the tech makes note of the date codes on the potentiometers; if original they might further substantiate the time frame when this 6120 was made. Also, since these are open f-holes, can you peek inside (preferably with a mechanics mirror) and tell us if you see any kind of bracing connecting the guitars top to the back? Perhaps you could put the camera of a very slim cell phone through the f-hole?I think this is a prototype/experimental 6120; while this can't be conclusively proved, it's at least as likely as it being a custom- order.1) Body depth. Standard for these was 2"; this one is 2.25". We've seen the 6113 proto-Tennessean with this same body depth. If a customer wanted more of an acoustic response, would he have asked for only 1/4" more body depth? Maybe. Maybe not.2) The lack of binding strips that DuoJet55 spotted. This seems too much a departure from the standard version as a customer request, but does make more sense as a preliminary iteration to the standard model. Were the 6120 double-cuts engineered/made before the double-cut Gents?Gretsch was already making a radical departure with the sealed-top, double-cut design. It makes sense to me that there would be early iterations which would then be sent out into the marketplace.Oh yeah, there's that weird heel cap too. Ed's 6120 book arrives next week.