Graham,
Very nice acquisition. I have been a fan of Nomos for some time, although I don't own any of their watches. I respect their design sensibilities, their dedication to in-house movement development, reasonable sizes, and high-value (to the owner) pricing. I understand that as time has gone on, they have moved more and more of their watch production in-house, to the extent that they now produce their own balances and hairsprings (or so I've heard).
I believe your watch has their in-house "Alpha" movement, whose design was based on the Peseux 7001. Alpha retains the great beat (21600), good PR (44+ hrs), and thinness (2.5 mm) that distinguish its parent, and which make your watch so wearable.
I would like someday to acquire one of their watches with an automatic, dubbed the Tangomat, which is a product of their chief designer, Marco Heyne, formerly of Lang & Heyne. Seems to represent a relative rarity: a modern, in-house, robust, accurate automatic at an affordable price.
Love the orange!
-Tom