Specs of the above watch: PureTime Mark XV Spitfire case. This case has the correct dimensions (19mm lug width, correct case back) Swiss ETA 2892-A2 movement gen IWC dial gen IWC hands (thanks, Texski) gen IWC crown and crown tube (thanks, Texski) rep buckle (I've switched it to the rep IWC deployant clasp)
The photos were taken with a Google Nexus S phone!
I should add, if anybody is interested, I have an extra case with gen crown tube. All you'd need is a dial, hands, crown and movement. This case can be used for the Spitfire XV line as well.