Fashions do come and go and so this £645 repurposed clock could well be worth £0 and a trip to the recycle centre in 10-15 years time.
My main peeve is the sheer number of system clocks which have been 'updated with a modern movement'. This tends to make original clocks rarer and as a result the price of them is creeping up. Fair enough if you just want one as a running wall clock, but the prices of just adding a quartz movement, often with the wrong type/size of hands seem to be just ridiculous.
