Agree that it is an ELB-style carriage bow (lower poundage, maybe 40lb). Dr Charles Grayson brought one to MOJAM one year. I thnk his was osage orange. He was a fellow who travelled abroad and collected a good many bows as well. Degame is also a good guess for a wood that was used for bows. Water buffalo horn tips. Doesn't appear to have been use much with all its reflex.