Marty Feldman and John Cleese Bookshop sketch

From "At Last the 1948 Show" in the 60s.

John Cleese, Eric Idle, etc. in pre-Monty Python days and David Jason (of Del Boy fame).

This sketch is a bit like the Monty Python 'cheese shop sketch', but I think it's funnier. It features John Cleese as the book shop man and Marty Feldman as the customer.