 Lokomotiv's best performance in the Bulgarian Cup came in 1947, when they lost to eventual winners Levski Sofia in the semi-final, a feat, which they would achieve again in 1987, but again losing to cup holders Levski Sofia.In the 1962–63 season, they won the B Group title, earning promotion to the A Group for the first time in their history.In the following top-tier season, Lokomotiv endured a difficult 1963–64 campaign.