The 3mm Society launched the first British outline 12mm gauge loco for over 50 years in 2020. The Class 57 was based on Piko Bo-Bo chassis with a resin cast body and bogie extensions to make it Co-Co. The original batch of 20 locos was pre-sold so a second batch was built using 3D printed body. The model was produced in two tone green or rail blue. all 40 locos have been sold and a few extra orders remained unsatisfied. The build was completed ostensibly by the North West group of the 3mm Society.
