My '57 pre-mil 99F has a jeweled breech bolt and sling swivel studs. Did the guy that had my rifle before just have too much time on his hands and added some embellishments, or were these standard items on "57 pre-mil F's?
Thanks

It was standard by then.

But not the sling swivel studs

My late 50's 99 had a jeweled bolt with a lot of wear on it. Definitely looked factory.