Not exactly sure of the exact era, but this Rowenta space age clock with pendulum is certainly an interesting design.
I would guess late '70s, possibly 1980s, but it would sit well in any space age-inspired room, even if the design dates from a few years after the height of the era.
For your money, you get a clock that stands around 17 cm high, made of white plastic, with a contrasting black face and a small black pendulum at the bottom. There's also an alarm function to get you out of bed in a morning.
Condition is described as 'greet', with some minor scratches and it is 'fully working'. If you want it in your home, the current price is 99 pence.