That front hub brand is Normandy, very common high-flange alloy hub on 70s bikes. As far as serial #, it won't give you much info, but it's likely on the left-rear dropout. From the lugs, heabadge and components, I'd guess your frame is from 1971-1973. Is the "Raleigh" on the downtube in cursive font? If so, it's likely from 1971.

Neal