Found a nicely engraved sliding breech shotgun a few years ago on consignment. The dealer said it was a Darne, but was marked Dakin where Darne places their name. The stock had been cut for a recoil pad.
I walked away, then called back and made an offer which was refused. I was a bit relieved as I shortly thereafter found a nice genuine Darne in 28 ga, with more delicate engraving that would not chew on your hand as the deep engraving on the Dakin(Darne) in 12 ga.
I tried researching the Dakin co and could not find much info, except that they had been an importing company in San Francisco.