These are clearly stamped KONI 76P-1413, comparable to an IKON 7610-1413 ($740 + shipping + duty + tax).  I believe they fit later Honda cb750/900, early twin shock CBX, and perhaps an early Gold Wing? They are a bit long for my 1969-78 SOHC cb750s……Google the part number for more info.

They are either new or have seen very little use. The black paint on the springs is flawless, no chips or scratches on the alloy portion. Perfectly straight with no corrosion of any kind. 

The top bushings has a 16mm bore and they are about 14.4” centre to centre on the mounts. I’ve had them apart and there is about 2.25 turns of rebound adjustment (achieved by bottoming the shock and engaging the adjuster). At “full hard” they are almost impossible to extend. I set one at the midpoint and gave it a nice polish (bottom one in pic). Finishing up the other one today. 

Ready to install. $400 + postage. I prefer cash or PayPal.