OKMO Micro Scale M65 Mini V2 Steam Engine Model Gift

Microcosm Mini Steam Boiler Steam Engine Model Gift

Shovel Head R31 V2 Double Cylinder Gas Engine Model

Microcosm Mini Steam Engine Model

Mini Vertical Stirling Engine Model(J06B)

World's Smallest Horizontal Stirling Engine Model(J06C)

OKMO World's Smallest Vertical Stirling Engine Model(J06A)

OKMO World's Smallest Stirling Engine Model (J02)

Vertical Single-Cylinder Reciprocating Double-Acting Steam Engine Model (M31)