Four teams that Celtic have only played once – or have they?

There is a long list of Scottish teams the Celts have only encountered once – the Scottish Cup throwing up many early ties against clubs that are no longer with us or playing in lower leagues. Among that list of one-off Scottish Cup games were ties against Leith Athletic and Vale of Leven, who the Celts also met on league duty in the early years, and Peterhead, who we could well come up against again in seasons to come in any of the domestic competitions...