1950s and 1960s Clausing 12" and 13" Models 6564, 6565, 6524, 6525, 6566,
6567, 6526, 6527, 8010, 8011, 8012, 8013 = Colchester Student & Master

1950s and 1960s Clausing 15" Models 6574, 6575, 6534,
6535, 6576, 6577, 6536, 6537 = Triumph Mk. 1

Clausing 13" Models 8014, 8015, 8016, 8017 = Colchester Master 2500

Clausing 13" Vari-speed Model 8028 = Colchester Student 3100

Clausing 15" Models 8030, 8031, 8032, 8033 = Colchester Triumph 2000

1950s & 1960s Clausing 17" 6582, 6542, 6594, 6583, 6554, 6543 = Colchester Mascot Mk. 1

Clausing 17" Models 8050, 8051, 8052, 8053, 8054, 8055 = Colchester Mascot 1600

Clausing 21" Models 8110, 8111, 8112, 8118, 8114, 8115, 8116, 8119 = Colchester Mastiff

Clausing 25" Models 8216, 8217, 8218, 8219 = Colchester Magnum

Serial Numbers