What time is it? Watches and horology

That is very cool.

I'd like one of those "tumbling digit" style post office/bank type of clocks, the ones that have the day/date/time.

I often see them at car boot sales. Most are sold by dealers who want £20 for them, but I once found a Copal one for £4 and sold it for £35. They're usually known as 'flip clocks'

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140538158824&mfe=sidebar

Oh! This would be a great addition to my vintage Braun collection (which is sadly smaller than it used to be)