Per your PM -
The non-Newman 6239 came from Japan several years ago (I cannot remember the seller's name, but, if I recall correctly, he deals only with Asian-based buyers) & is powered by a modified 7750 (I removed the auto-wind module, effectively turning it into a manual-wind & reducing the movement height allowing for the fitment of a gen-style/sized caseback) & is fitted with the following genuine Rolex parts: crystal, bracelet, crown/tube & pushers.
The remaining 3 are powered by Valjoux 72s (the base movements for all 62xx Daytonas) with modded MQ dials (I swapped the coronets for gens & painted the index markers on the black dials) & fitted with the following genuine Rolex parts: crystal, hands (for 2 of them, but I forget which 2?), bracelet, crown/tube & pushers.