I haven't been able to identity the model of this Smiths Enfield clock - I'm not even sure if the clock case and face are genuine. The clock movement has been replaced with a cheap Sakura quartz movement.
The closest match to the clock I've found is in Barrie Smith's book 'Smiths Domestic Clocks'. Page 134 shows a school quartz clock made in 1979 (School Clock Mahogany 79).
Rubik's cube was first sold in 1980, so maybe the photo with the cube and clock in isn't entirely out of place.
Thanks to my best friend for helping find this clock - and if you think the clock is a bit fishy... then head over to his blog about fish.
If anyone has any more information about this clock I'd be very keen to hear from you.