G&H always ground the screw heads flat when they do the installation. As well as 3 screws there are 2 pins. In spite of somewhat ugly, they are very solid and allow the use of irons should the scope fail.

https://griffinhowe.com/mounts

The reason Proxibid is a good source on values is that it collect ALL the sales from every major auction house. If you do a search for "Savage 99" you may see several from different sales all over the country. As we speak there are 8 there including a $35000 G&H engraved one. With a custom made G&H mount.

If you join and "watch" the auction, you can see what it closes for. Don't forget to add the buyer's premium ! Shipping is also very expensive.