Decoding SMLE markings

[5thBatt]

Looks like that rifle was originally intended to be a Mk III (no star), too - the * looks like a later stamping, presumably from when the date was remarked as the gun was assembled?

The whole of the III* is centralized below the markings so was a III* from the start, if not the middle I in III would be central as on these MkIIIs



a 1917 MkIII*