Hour glass mold made at Burt and distributed by Rigdon in Cincinnati.
Burt Co - Alonzo Burt started Portland Billiard Ball Co in 1912 - 1st clay chips made in late 1920's.
Kind of shoots down the sellers claim of Texas Rangers raid 1890's to 1910.
BTW. the Rigdon records exist. Hope someday we can get them released to the hobby.