Poconojack: Sure looks to me like the rear bridge of that single digit serial numbered Model 70 has been drilled and tapped and a plug screw installed!
Reference - enlarged photo #6 of 15 (and also look closely at photo #9 of 15!)!
This and the fact that virtually every angle of photo is shown except one that would absolutely and clearly show the status of that rear bridge gives me much pause.
I had a chance many years ago to buy a single digit pre-64 Model 70 - sure wish I had taken advantage of that opportunity (30GOV'T'06 also!) now!
Hold into the wind
VarmintGuy
