Where is here? I'm from Toronto and I've got a 1965 Merchants distributor catalogue that lists a bunch of Raleigh models but no Dunelts. We saw lots of them in TO but perhaps they were withdrawn from the national market by that time. In '93, I was in Groves Cycle on College St and they had no less than 6 early 60's NOS Dunelts (D forks), hanging from the walls. Perhaps they got a deal on the remaining stock because they had no other 3 speeds at all. Why didn't I buy a few.
I'm going to try to make a gracious exit here by suggesting that it's very difficult to nail down what your bike should have been even if you had some documentation because Raleigh was an international juggernaut that was in some ways, out of control. Anecdotal snapshots from online sources can only point you in a direction but they will never be gospel. I've been horsetrading 3 speeds for a few decades now and I've learned to enjoy the ride, not the technicalities.