You would be very surprised how many watch BRANDS don't make their own movements. It is a fine art and very expensive, therefore many companies buy their movements from the same company and then do the rest.
2013 AW/BLK - DCT, Comp/Cold/Prem
Mods - IND Beauty kit, CF Roundels, CF Splitters, AiB Angel Eyes, EAS Exhaust Tips! B&G lowering springs