markinaz: Not a big fan of Franck Müller watches. I really like rings.

This watch is a concept. I did it because of my passion for bitcoin and watches. thanks for your feedback.
I like your watch design - as for the private key - put an encrypted pk on the watch - like BIP38 and then you don't have to cover it or worry if it is stolen - they would still need the passphrase you have in your head. (of course back that up somewhere at home)
on a side note, I am looking to get some rings like what you have pictured in the near future to do some laser work on

Love that raw ring design. Something I thought about getting into a while ago but haven't followed thorugh so far. There are a few companies accepting custom designs.
But something cool that you come up with would definitely be something I'd be interested in.