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If the John Lewis take on the period wasn't your thing, perhaps the 1960s-inspired Quayle wall clock at Habitat is more to your taste?
That should actually be 'clocks', as there are two variations, the smaller black version and the larger red version, 30 x 30cm and 40 x 40cm respectively. Away from that, both are battery powered, both have a square frame and both have that large 1960s-style font for the numbers.
The small sells for £30, with the larger retailing for £40.