Yep, I like Farrel's design too.
I currently have a Casio tough solar watch which has two features that I really like - it is solar powered so you never need to change the battery, and it also picks up radio time signals so it is perfectly accurate and so always in perfect synch with the aircraft gps-clock. Other features of the watch are poor however - cheap finish, tiny digitial window, date only in US format, and fiddly knobology.
I would like to combine solar power and radio-time with Farrel's design. I'd also quite like a means to record block off/ block on UTC times.