Complex sentence: The Tam O'Shanter was well known for many a year as being a part of the Pymble uniform, however it has been replaced by a navy felt hat that predates it in Pymble history.
Split into simpler sentences: The Tam O'Shanter was well known for many a year as being a part of the Pymble uniform. However, it has been replaced by a navy felt hat that predates it in Pymble history.