Raleigh bought out all the other English bike makers in 1960. Yours is a 62, because it looks all original and not used that much, so that is the hub that came with it. The month it was built should be to the right of the year digits. The pedals aren't worn out and the paint, graphics, and fenders look good. Raleigh made their own brand a little better, but those generic models, like Hercules, Robin Hood, BSA, Phillips, Hawthorne, and Huffy 3 speed English bikes after 1960 were good quality bikes.
I've had more than a few over the years. I rode a ratty 65 Hercules all over the world when I was in the Navy back in the 80s.
The paint was pretty good on those bikes. Being careful of the lettering and graphics, I would give it a gentle scrubbing with soap and water, then use paste car wax a few times to bring out the shine. The chrome was good too and should clean up nicely. The seat looks good too, especially for a 62 model. I would go through the whole bike and shine and lube everything except the 3 speed rear hub, I wouldn't take it apart. The bearings in the front axle, headset and cranks are loose so be ready to catch them. You might just add some lube or oil to the crank bearings somehow and leave the cotter pins alone.
There still isn't much of a market for these bikes though, you would have a hard time getting 50 bucks for it, even though it's better than a 250 dollar new bike.