'Go do some metalwork - you can't possibly ponify that.'
Just for fun, here's a 30cm square sheet of polished aluminium decorated with brass gears, and engraved with a diamond burr. Twilight at her most disturbing from Lesson Zero, with 'Want it need it' and 'clock is ticking' in alternate corners. All the engraving's actually the same depth, it's just tricky to take an even photo of it! Standard quartz clock mechanism and metal hanging loop. Rather fun way to spend a Sunday afternoon - I'll pop it on eBay if anypony's interested, for the usual £0.99 start! [link]