I took a punt on this decanter with a set of Canada glasses because the signature the seller described when I enquired about it sounded just like the one used on production samples. I didn't recognise the shape, but the colour in the photograph and the general style looked okay.
It arrived today and the colour is pretty much Wedgwood 'Midnight', the decanter body - now I have reason to question it and look elsewhere - is near-identical to Thrower's 'Marcel' decanter, the Lütken signature completely unlike the real-world one, and the engraved numbering completely apart from anything Holmegaard have ever used.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=260486281981&ssPageName=STRK:MEWNX:ITAre my Wedgwood suspicions correct?