I picked up one off of GB end of 2020, NIB as well. Not sure the seller knew what it was, as far as a limited production run. I know I hit the buy it now at 650. Did some research on this site and elsewhere, came up with 99 made for Davidson's around Dec of 2015. Later also read maybe 300 were released. Maybe that was the total of 2 runs? When looking into it, I also saw there was a sister model to it, believe it was the 6517, Single Six 32 6 rd, 5.5" bbl, blued with Vaquero style fixed sights. I've seen exactly 1 for sale since, it was NIB for $500....and I didn't have it at the time! I'm out of state at the moment, but I'd like to see if its a consecutive number to mine, as I may be interested. Thanks, Bill