I know that I am late to the party I have heard of Post Versalog (I own both a full size and a half size, as well as a full size Post Triglog), Pickett, and K&E slide rules but I have never heard of an OBR slide rule,  !
MTD, Sr.
__________________
Mark T. DeNucci, Sr.
Trumbull Co. (Warren, Ohio) Bkb. Off. Assn.
Wood Co. (Bowling Green, Ohio) Bkb. Off. Assn.
Ohio Assn. of Basketball Officials
International Assn. of Approved Bkb. Officials
Ohio High School Athletic Association
Toledo, Ohio
|