Many independents have started by modifying existing calibers, many of those being 6497 or 6498.
It's a nice large, robust, simple caliber that's a good experimentation platform.
I like that he hand folds the mokume gane, and only uses a hammer to form the pattern. That's the
original Japanese method, I believe, not drilling holes in it, but peening it. It would have been done
that way by smiths for sword fittings and such.
The 3 second delta is very nice, but not unheard of. A very good adjuster can get a watch to that. An
excellent adjuster can get it even better... I am not one of those, but there are people out there
who can... just saying. At that point, getting it any better becomes a chase of the most minute
details, even for another watchmaker- things like stoning the balance pivots to equal contact area
to equalize frictional coefficients in all positions, very small things. Mr. Kikuno is very good to get it
to a 3 second delta, I'd say.
I really want to see that hairspring weight he's using... I'd love to learn how you apply them, but I'm
sure it's a secret

-O