The D12 is an ebay win from the same seller as my D16. Mine is a D12 EL with electrical heating. As my D8 EL she is 220V and rather rare. The export version with 110V is far more common. Like her smaller sister (except the D10) she has an oscillating cylinder. She is more powerfull as those emaller engines, because the bore is bigger.
The Engine has been restorated to 1a condition by the seller.
As with all electrically heated Engines she produces steam for some minutes after pulling the plug.