Hello all. I have a Winchester 97 built in 1918 that appears to be a legitimate Trench gun. After reading Canfield's book, I believe it to be a WW2 rebuild as it exhibits the following characteristics:

-parkerized
-WW2 style stock
-metal checkered buttplate
-four row ventilated heat shield ("W" stamp on left side)

Other traits it has

-serial number is in correct range of a WW1 trench
-barrel is exactly 20" measured from the bolt face, and is marked "CYL"
-hand stamped flaming bomb and "US" on right side of receiver just forward of the ejection port
-has the "WP" proof stamped on top of receiver and barrel
-heat shield fits snug on barrel without shims or sleeve.
-barrel has three grooves in the bottom.

One thing I am not sure of is that there is a hole about a 1/4" from the end of the muzzle that has been filled in with a black substance. The hole itself is not threaded. Right now I'm thinking Bubba however wanted to check to see if it is possible it was mistakenly done at an arsenal or maybe some other explanation.
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