• I’m guessing the movement would fit in a 40mm case or smaller. A fully custom, say 39mm GMT (maybe without a rotating bezel) using that movement would be super interesting. If Seiko supply it as an NH series calibre (edit: they do), some microbrand could make something killer.

    Also wonder if you could just transplant the movement, dial, chapter ring and hands into an SRPE and get a 40mm GMT. I’m guessing not (edit: you can, but not with the stock 24hr chapter ring, plus you need a double domed crystal).

  • The NH34 movement is, as far as I'm aware, effectively a drop in replacement for NH35/36, although may need a taller crystal to accommodate the taller hand post. I'm pretty sure a couple of microbrands are already putting out watches using them

  • Yeah, looks like in terms of dimensions it's almost identical - only a few differences, eg as you say, the height required for the extra hand, and a larger centre hole in the dial.

    Some kits here already I see

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