Thanks
Thank's to you members for help and suggestions. Does resemble an '8' or possible 'B'. Not a weight stamp. It does have a border that is on all 4 sides with single mark/stamp in center.
It is an old solid 4 pt full splice blank for sure. From investigating, short joint was one of Bensons build traits but do not see where he used the border like this from the little I did find.
Pic's came out a bit large. If you slide away from screen it becomes a bit clearer.
Anyone other ideas ?
-Davekat