Winchester barrels have been faked since the early 1990's, there was even an article by Dick Deane in one of the GCAicon journals showing photos side by side of the fake WRA barrel and an original WRA barrel.

The short chambered part is very suspicious and without detailed photos of the lower band section and drawing number - you are taking a chance- the fake WRA barrels sold for around $150 and original new condition has to be in the $700 to $1000 price range