There Is Many a Good Tune Played on an Old Fiddle

There is many a good tune played on an old fiddle

This proverb is used to suggest that even though something or someone is old they can still be effective. It can also imply that skills and knowledge can outweigh youth or novelty. 

“You think your grandpa is not able to lift this heavy bench. Well, then look, there is many a good tune played on an old fiddle.” 

WORDS
to imply: to indicate in an indirect way.