1951 Lohmann 18cc Diesel Cycle-attachment Engine

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The 18cc 2-stroke Lohmann engine was officially described as a ‘mixture compressing self-igniting two-cycle motor.’ It fixes under a bicycle’s pedal crank and operates the rear wheel by roller.
When it originally went on sale in Great Britain, the price was just under £25 10/- There’s neither carburettor nor ignition system. Instead the engine works on a variable compression ignition system, which is moderated by the twistgrips.
Inventor and designer Hermann Teegen (1899-1962) is the spiritual father of Lohmann engines. He designed several similar engines, 3 of which were patented. From one of these prototypes, over a period of 3 years, the current 18cc Lohmann engine was developed. It first appeared in 1950, and 51,000 were built by August 1954.
1951 Lohmann 18cc Diesel Cycle-attachment Engine
Type 500. Model 51.
New-old-stock. Never fitted to a bicycle

I bought this Lohmann diesel engine in Europe recently, and it’s on its way to me.

It came from a closed-down cycle shop, where it had been on a shelf since it was new, so it’s in functional condition.

When I receive it, I’ll have a dilemma. Should I fit it to a bicycle and take a video of it running?

Or should I leave it as it is (but with better photos) …because part of its collectible interest is in the fact that it is new and unused?