Definitely a 3. The other thing I just noted is there is an additional letter marked on the BB, separate to the main frame number. The letter K. I guess it could be 1973, rather than 1983. I notice that the 1973 Professional Mk IV has the sloping fork crown.
Hoping for some advice. I picked a nice steel (531) frame for a SS project and on closer inspection, while it's been refurbished nicely by Goff, the seriel number (starts WD3...) and lug style look very much a Raleigh to me. It's clearly had some modification (some cable guides removed) and...