Right, there are a few issues here:
1. Mark 1's have no RTC (realtime clock). Therefore, there's no menu option to set them. There shouldn't really be any way to display the clock on a mark 1, because it's almost certainly bogus.
2. Setting the clock from RDS. Should work on a mk1. Is the tuner on a mk1 good enough to pick up RDS reliably? However, since some stations don't broadcast the correct time, this needs to be configurable. You can't use any magic, like is it <1 hour out from the current time -- mk1's don't have the RTC. Great for the mk2, though.
3. Setting the clock from emplode. Same as #2, but the time won't be wrong. Still won't work on the mk1, though.
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roger