Claim: In the 1931 FA Cup Final West Bromwich Albion and Birmingham played at the original Wembley Stadium in Wembley Park, London which hosted the FA Cup from 1923 to 1996.
Evidence: The FA Cup final was played there in April or May until 2000 (excluding the 1970 replay when Chelsea beat Leeds United at Old Trafford). 
On 20 May 2000, the last FA Cup final to be played at the old Wembley saw Chelsea defeat Aston Villa with the only goal scored by Roberto Di Matteo.