Which is the Geekiest Watch?

This is a Casio F-91W wrist watch and it cost about £6 from Amazon.  I think its the best Geek watch, but the question is.... What is the Geekiest Watch? 

Are you old enough  to remember the LED watches appearing in the 1980's? The ones way you pressed a button and the display just lit up for a few seconds?  And then the later LCD watches just like the Casio above?   Like all radical new technology they were very expensive,  I remember a friend paying over £50 for the calculator model. 

Of course a real contender for Geekness is the binary watch, a timepiece where you have to know the base 2 numbering system to tell the time and translate it to decimel every time you look at the face!   This evening whilst surfing for watches I was shocked to discovered that the big catalogue retail chain  Argos now sells binary watches, is nothing sacred?

If we talking binary watches then the O1 The One Kerala Trance Blue LED KT102B1 is probably one of my favourites

Which do you think is the Geekiest watch?