This is not a limited edition, although it is serial numbered and I don't think many were made.
The cylinders are in a V configuration with a phase angle of 90 degrees. (However, being single acting, this is not the optimum configuration.) The cylinders are 4mm bore x 7mm stroke and are oscillating cylinders. The port face block is mounted on a decorative pillar with an oil reservoir on top. The two cylinders are fed through a single inlet pipe but each has it's own exhaust pipe. This means that the engine can only be run in one direction and cannot be reversed by reversing the ports.