When I got my bike about a year back it had the original 1982 gearing: 52/42 on front and 14-19 on the back.
I bought exactly the same model new in 1983 and rode it round London for 10 years, including the 'hills'.
Now I'm a bit older and know a bit more I've got a 13-28 7 speed freewheel on the back.
Sunrace also do a 13-34 but it's not chrome plated.