I've got two bases marked 1 and 3.
Any idea what rifle they are for?

Based on me buying them they should be for Rem 700, Win 70 or Mauser.

No. 1 is front ring Mod 70 Winchester pre and post '64.

Not sure of 3 as a rear.

#24 is Pre 4 long Action Mag rear (0.435")
#10 is post 64 Long Action Mag rear (0.330")
I think # 2 is Post 64 Long action standard rear, but I could be mistaken as don't have original package but front is #1. Actually I do have the older box stating a Win 70 .360" Standard Cali and Short Mag and also Montana 1999.

Talley replied.. on a sunday.. Rem 700