Complex sentence: In September 1955 the board of directors voted to merge Colt with an upstart conglomerate called Penn-Texas, which had acquired Pratt & Whitney Machine Tool the same year the same year Colt released one of the most famous revolvers in history the Colt Python.
Split into simpler sentences: In September 1955 the board of directors voted to merge Colt with an upstart conglomerate called Penn-Texas, which had acquired Pratt & Whitney Machine Tool the same year. Also in 1955, Colt released one of the most famous revolvers in history, the Colt Python.