Reblued by a foreign country is possible but I would be highly dubious of any importer rebluing the rifles, know that up to just a few years ago nobody really cared about this rifle, she was the little bastard read headed step child.

Chances could be very good that the imports your seeing have the original blue on them, for some reason many of these rifles that were lend leased, or purchased by other countrys didnt seem to see much use if any.

Dan