Standard SL1 with addition of cylinder covers and brass chimney cap, along side a refurbished SL1 in blue with some basic cosmetic upgrades.
SL2 in powder blue with brass boiler and balloon stack chimney. Cylinder covers have been fitted and the rest of the loco remains as standard.
SL3 maroon engine with brass boiler and balloon stack chimney. Cylinder covers have been fitted and the rest of the loco remains as standard.
Modified SL4 'Princess of Wales' with matching tender. Modifications include MSR continental style cab upgrade, side tank enhancements, upgrade cylinders, lamp and perch bracket.
Standard Mamod SL5 'Prince of Wales' having special blue livery with matching wheels. A commemorative sticker can be seen on the inside of the rear cab sheet.
Mamod SL6 with water top up system including pre-heater, methylated spirit burner, SV blow off pipes, pressure gauge, upgraded cylinders and working firebox door.