I've got a pre 64 standard rifle, circa 58 or 59 IIRC. Mine is a .257 Roberts though. With the matte finish on the action, matte finish on the wood...I went with the 6x42 Leupold but in...You guessed it...matte finish. The 6x42 is a wonderful piece of glass. Even at 300 yds on a whitetail it was all I needed. Very sharp and clear too. And for the magnification it looks RIGHT on most bolt rifles, not too big, not too small.

Also have a near 100% pre 64 in .300 H&H and went with a matte 3-9 on that in Talley removeable rings and bases. The matte looks fine on that rifle, despite far better finish remaining.

I would try to find one of the leather slings that used to come with Rem 700's years ago. A simple 1" quick adjust type sling that IMHO looks "period correct" on the older rifles. And a used oen from the 70's or 80's will have a nice used look anyway.

Or find one of the quality leather rifle slings; Brownells makes one, El Paso Saddlery does as well.

Another thought is a company that sold at the SCI annual conventions, same style sling as the Rem 700's but available iin 1 1/4" and 1 1/2" widths... Murray leather Co, out of TX.

FN in MT