Mystery finish on Fazakerly No. 4 Mk 2
Recently picked up this clean Fazakerly No. 4 Mk 2 at a cheap price. It came with the S&K mount, no scope, but appears otherwise unmolested and is a good shooter. There is no marking or serial number on the receiver or socket, but the serials on the rear of the bolt and forearm match. I don't recognize the finishes on the rifle and can't tell if they are original or aftermarket. The receiver and barrel finished in a semi-gloss black with a slight eggshell texture. There is a very faint importer mark on the the the receiver that appears finished over, which makes me suspect the finish was applied after. The other parts are finished in a light gray parkerizing. Any idea if these finishes are military applied or aftermarket? Should there be a serial number on the receiver wall?
Here are the photos (click on IMGUR link):
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