WRA 1,080,7xx Stock:
WRA used the I cut oiler/Hi-wood from start of production to roughly 1,153,591.
The Oval oiler/Hi-wood came in around 1,067,649 until the end of the first serial number block.
The Large boxed WRA over GHD was used to ~ 1,067,649.
Un-boxed WRA over GHD came in around 1,055,513.
So there was some over lap of both stocks and stamps.
For a Hand guard, You could use a Type 1. Deep sighting groove, Un-marked or with a W. Winchester handguards are found with a particular milling style underneath.
The routered circles usually show the last cut as being on the outside edge.
This is what I've noticed anyway.
HTH,
Charlie-painter777
https://www.milsurps.com/images/impo...DSC05985-1.jpg
https://www.milsurps.com/images/impo...DSC05988-1.jpg