The famous Shepherd Gate Clock at the Greenwich Observatory has been featured frequently on these pages, but at last you can wear this iconic design as a watch, courtesy of the folks at gtgwatch.com.
At present you can still join in their Kickstarter Campaign, but hurry — the 24 hour models are selling out fast (there is a 12 hour version for the less adventurous).
If you have a Mac computer, you can download my old Greenwich Observatory Shepherd Clock screensaver (halfway down this page). Surprisingly, it still runs OK after nearly 10 years:
24hourtime.info 
I would like to buy one of those 24 hours watch from GTG and need the contact information to
order it ! Can you please give me that information ? My email is : dzeger@globo.com
The only links I have are in the first paragraph of this post.
Is this watch still available?
Looks like the company listed in the first paragraph of this post are longer trading.