Yes, both of these are CLINCHER rims. The Dunlops are true British cycling classics of the era, extraordinarily light and a lovely pattern. They would be very appropriate for an RRA especially one from the 1950s. I have these on my '58 RRA Moderne. Excellent with 27 x 1" (not 1 1/4") tyres which you can still get on eBay (I am using Japanese copies of the Dunlop HP tyres on mine).
You will love this machine when you get her on the road. I had three hours on my '48 today... I am almost forgotten the sublime delight of this machine when ridden hard, flat out with the distinctive "tick-tick-tick" of the Sturmey-Archer FC hub and unmatched smoothness of a hub gear. She took on all comers and bested the lot of them. Just outstanding for a 59 year old machine.
Peter Kohler
Washington DC USA