Notes: The PARKER 275, and the nearly identical 285, replaced the Parker 27. The Parker 27 was an updated version of the SUPER SEAL 27 which was a MK 2 version of the Super Seal 26.\nSuper Seal 26: 1981 - 1984\nSuper Seal 27: 1984 - 1987 (MK 2 version of the 26)\nParker 27: 1987 - 1990\nParker 275: 1990 - 2000\nParker 285 (named changed to reflect actual LOA of the 275) 2000 - 2009