I have seen a pup like this before, although it didn't have the tan markings.
As Emily has said I described it as 'Tiger Striped' after talking to Pam Walker.
It definitely isn't Sable & the markings disappear when the puppy coat comes out.
edited to add - I agree with Jane that there must be particolour in the breeding, which would explain the white muzzle, unless it is an over exposed photo!