Is this SA 7.62 ammo

[Skinny Shooter]

I need some help identifying some ammo.
Unfortunately I don't have a photo yet.
It is in a battle pack.

The pack is labeled like this:
140
Round 7,62x51mm BALL R1M1
Lot 80A6 79

The brown cardboard box is labeled:
20 Round
7,62x51mm
Ball R1. M1.
80
A 679

I suspect this is south african ammo.
Any ideas what its worth?
thanks,
Allen