Small diesel engine...
DAVIES CHARLTON LTD DC Vintage Quickstart RC Model Airplane Diesel Engine (info from eBay of all places).
Another family heirloom... which I don't think has ever been used. It looks "new" anyway, even if it isn't.
Could have been my Grandad's - both him and my Dad were into aeromodelling... but I don't remember my Dad using this one...
Thanks for the correction rob099.
- Nikon COOLPIX A900