The striking clock tower in the centre of Chesham looks older, but it's not: it was built in 1992! However, it's the tower that's new, not the clock itself, which used to be a part of Chesham Town Hall.
This was actually built in 1992, on the site of the original town hall (demolished in 1965) but it does feature the original glass-dialled clock. The bell chimes on the hour.