What rings fit a Herters/BSA U9. Receiver top looks like a Sako?

I had a BSA years ago and the rings were marked Parker Hale.

help

I have Weaver detachable rings on mine that I put on it in 1967.

The top of the receiver on my Herter's U9 is grooved, and the Weaver rings attach directly on to the receiver.

The later BSA rifles, the CF2, used a receiver profile identical to that of the Remington 700.

Try an internet search for Knibbs Countrystore BSA they hold all BSA spares.

They may know which bases would fit your rifle?