Celtic wore this Umbro home shirt throughout the 1989/90 season, a period of consolidation following the club's centenary year. The vertical green and white hoops are among the most consistent visual identities in British football, tracing back to Celtic's earliest years after their founding in 1887. Umbro's late-eighties cut gives the shirt a particular period character without straying from the essential template. For collectors, it sits at the intersection of a dependable design lineage and a specific, readable moment in the club's modern history.