Yeah I agree, the thumbhoe stock does change the appearance. Factory stocks were checkered walnut monte carlo with black plastic buttplate, grip cap and forend tip and I believe they have white spacers as well. They have rather square fore ends and really slim grips. I added a palm swell to mine.
No markings under scope based on mine, that I recall anyway.
Mine obviously rode many miles muzzle down in a pickup, the crown is worn off at an angle. Musta been shot a lot too as it shows a fair bit of throat erosion and light frosting in the grooves. Still a very good shooter though. It likes handloads with Sierra 100gr Gamekings over IMR 3031 with a mv of 2825 fps. I've had it out to 600yds on occasion, on a calm day it would shoot m.o.a. groups. Interested in hearing how yours shoots. Keep us posted.