Sorry Frank . . .Not true . . . .
There are factory-installed sling swivels on all my "standard"grade M70s.
I find the OPs' M70 to be of the vintage I need (1949) to insert into my "string" of "pre-64" years.
I have a 1946, '47, '48, '50, '51, and '52 . . . .all standard grades.
(The 1946 is of "pre-war" configuration, being made up with the beautiful, pre-war parts! . . . .INCLUDING the 20-line checkering on the stock!)
One can see the degradation of the quality of these gems as the years progressed.
(In fact, my 1998/99-era Featherweight has a safety that refuses to engage unless the bolt handle is jiggled as I move it to safe.)
OP . . . .Enjoy that rifle!
How's the bore? . . .There was a TON of 30-06, GI-corrosive- primed ammo available back in the 1950s' that ruined some nice rifles, thanks to Bubba' NOT cleaning in a timely fashion!
My son has a camera that he can run down the bore of the rifle. He said there is a little bit of pitting that you wouldn't see with normal visual inspection. It doesn't appear to be anything that would effect accuracy. Rifling is good.