This is the nicest production Lineman's knife I've ever seen. I have its twin in ebony. The tang reads "Buffalo Cutlery Co" and as I understand it Buffalo Cutlery Co never manufactured knives, they only purchased factory seconds, ground off the original manufacturers tang stamp and then stamped their name on the blade.
I'm almost certain this is a "Schrade Cut Co" knife as the ebony twin I have is. It certainly appears to be Schrade jigging to me. In my search I came across the info I relayed above from AAPK site. In the description of the knife on the auction site it to leaned towards the info I found on AAPK site.
This is hands down the most stout, solid traditional pocket knife I own. Thick blades, no play, no gaps or flaws that I see anywhere on this knife, the snap of the blades wakes the neighbors

The color of the bone is far prettier than the pictures convey. Nice full blades and only minor pepper spots, you press the main blade down in the closed position to unlock the screwdriver/scraper blade:thumbup: