It sounds impressive, and a very good idea. I don't wear a watch because only a really-gold one doesn't cause a rash, and it would be such a waste of money; a watch on a belt... hm, but since I left BT I rarely wear a belt either.

Isn't sewing leather difficult?

I did worry about that, but I got an offcut of quite soft leather from a leatherworker's shop, and it only took a little extra effort to get an ordinary needle through it. Probably if I'd wanted to do anything seriously heavy-duty it would have needed specialised equipment or skills or both, though.