Muhmenthaler reached his third Uhrencup Final with his third club in 1977 but was unable to repeat the success, the final ended in a 6–1 defeat against Neuchâtel Xamax. Reaching the final again in the next year, Basel won the 1978 Uhrencup 2–1 against the same finalists.
Muhmenthaler achieved his third Uhrencup Final appearance with his third team in 1977, but was unable to replicate the success, as he lost 6–1 against Neuchâtel Xamax. He again reached the final in the following year, and Basel won the 1978 Uhrencup by defeating the same finalists 2–1.