Complex sentence: The company is one of the oldest continuously operating organ manufacturers in the United States, the first instruments were built in 1893 with the Austin Patent Airchest, and many remain in fine playing condition to this day.
Split into simpler sentences: The company is one of the oldest continuously-operating organ manufacturers in the United States. The first instruments were built in 1893 with the Austin Patent Airchest, and many remain in fine playing condition to this day.