It is very possible that the Sekun Bo kata you are refering to is actually TSUKEN NO KUN. If so then it is a very obscure kata that was believed to have been passed down by a man known as TSUKEN MANTAKA. There are two other adaptations of this kata with Nunti and Eku they are
Tsuken Aka Cho no Eku
Tsuken Aka Cho no Nunti.
The kata is a very fast and powerful kata. Hope that helped.