Yes, the leaf hands are original to this particular watch. as is the blued second hand. However, this ref. (1578) came in a number of variations, and I have seen an example with Dauphine hands, as well as early variations with a sub-dial rather than center second hand. I believe, however, that they all shared the cal. 27SC movement.
Perhaps Suitbert or another expert could add further insights into this particular reference.
Regards,
Tony C.