All Signed Baseball Cards – PastPros
All Signed Baseball Cards – Tagged Roy Lee Jackson – PastPros
All Signed Baseball Cards – PastPros
All Signed Baseball Cards – Tagged Greg Blosser – PastPros
All Signed Baseball Cards – Tagged Billy Koch – PastPros
All Signed Baseball Cards – PastPros
All Signed Baseball Cards – PastPros
All Signed Baseball Cards – PastPros
All Signed Baseball Cards – PastPros
Billy Koch Trades and Transactions by Baseball Almanac
All Signed Baseball Cards – Tagged Billy Koch – PastPros
All Signed Baseball Cards – PastPros
Signed with blue Sharpie
Billy Koch Signed 1997 Bowman Baseball Card - Toronto Blue Jays