Mandolin:

Phil Skinner played a key role in 20th century development of the mandolin movement in Australia, and was awarded an MBE in 1979 for services to music and the community. He was born Harry Skinner in Sydney in 1903 and started learning music at age 10 when his uncle tutored him on the banjo. Skinner began teaching part-time at age 18, until the Great Depression forced him to begin teaching full-time and learn a broader range of instruments. Skinner founded the Sydney Mandolin Orchestra, the oldest surviving mandolin orchestra in Australia.

Please answer a question about this article. If the question is unanswerable, say "unanswerable".  At what age did Phil Skinner stop playing music?
unanswerable