Typically a 10,75x73 "A" type MAUSER made in Oberndorf circa 1928, up-graded with engraving and new stock.
"Cal. 404" marking on top of barrel seems an addition before Austrian proofing.
Manton & C° was a Mauser distributor and sold many Oberndorf made rifles stamped with their name (as Lyons in Calcutta or Charles Heyer in Nairobi)

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