Anyone recognize this star stamp from a No4 MkI receiver ring?

[Surpmil]

I don't remember seeing this five pointed star mark before, and can't find it in any reference books I have.

Does anyone know its origins?

Note that the crown of the BM proof mark is coincidentally struck right on top of the star.Attachment 37982Attachment 37981

Information

Warning: This is a relatively older thread This discussion is older than 360 days. Some information contained in it may no longer be current.

[Thunderbox]

Its an extremely common mark on No4s, and occurs with or without a "W" in the centre. My own view is that it is an inspection mark applied when the rifle was checked before being put into depot storage at Weedon.