Wonderful engine, thanks for sharing.
About thirty years ago I saw one offered for sale, complete with box etc. A bit burnt, but nice, though... I had just bought and renovated my flat, so money was a bit short. I didn't buy it then, though the seller had phoned me again because they rather wanted to sell it to me (collector) than to the eventual buyer (dealer)... I always become a bit melancholic when I see one (as they are far more expensive today...)