Due to a mix up with the playing gear prior to Glentoran's arrival in Amsterdam, the team were forced to use the Ajax third strip for the return leg of the UEFA Cup in the Olympisch Stadion. Glentoran had quite an impressive away kit at this time but for some reason it was left at home in Belfast. As far as can be ascertained, this was the one and only time in which Glentoran played in blue. One photograph does exist from the game, which saw Bobby McGregor's side suffer the biggest aggregate defeat in Europe in the club's history. For the record the score was 14-1. The shirt was manufactured by French company Le Coq Sportif.
The Cock 'n' Hens were pictured in this colourful away kit for the Panini European Sticker Collection in 1975. Worn with white shorts and green socks it would occasionally be used as a home top in its second year. Despite winning nothing during the 75/76 season, the side still qualified for Europe by virtue of securing the runners up spot in the league. Warren Feeney continued to impress scoring 37 goals in 45 appearances. Not only did lowly Carrick Rangers defeat Linfield in that season's Irish Cup Final they also took Glentoran's scalp in a 3-1 victory in the County Antrim Shield Final in April 1976.