All GC models were D&T. So no rarity there. KMK678 is heavy tapered barrel. With adjustable sights. The KMK678G is BB with adjustable sights. Not D&T except the last few. KMK678GC is slab side D&T with adjustable sights.
Ruger didn't drill and tap their Mark II autos as early as the 215- prefix, so I think that ones been done after-factory.
The first D&T guns that came out was the Camfour MK-512CA
From the reference...
MK512CA (Ruger model 0199) Special Distributor model. Has smooth laminated grips, is drilled...
I have been pursuing the D&T versions of the MKII. I have MK10, KMK10, MK678, KMK678, MK678G, KMK678G, MK512 and KMK512, KMK4BL. And an MK512CA. All NIB. The D&T variations are tough to find.
Pristine NIB. You'll find none better.
SOLD. KMK514. Outdoor Sports Model with laminate grips. With shipper.
SOLD. MK514. With shipper.
SOLD. KMK678. Factory D&T. From memory only around 100 D&T at end of MKII run.
$735 each shipped. Will consider trades on Jim Clark and early Volquartsen MKI...
WTB Volquartsen Catalogs and other paraphernalia. Looking for a lot of the older stuff. Also looking for VQ Mark II pistols and parts. And any other interesting custom Mark IIs.
Since I've been collection Ruger Mark II Target Models for years and now only pick up NIB or extremely nice or scarce models it's getting harder to find them. So about a year or so ago I started looking for the Mark II Models from custom makers. Here's a pic of three Match 10Xs. The back right...
Well it's been a dry spell. But got in another NIB KMK514 today. Back left. Thought I would pull out the others haven't seen them in awhile. The laminate models are from the first run of 1300 made for Outdoor Sports Distributor. All NIB.
I was shipping 60lbs AR500 steel plates a few years ago in flat rate boxes. They all made it to destination . But when I came into the post office there was a mad scramble of them leaving the counter. Last one there had to take the boxes.