Hi, just found this, been away for a couple of days. 1648 is an early one going by the numbering sequence mentioned on the website. I would get in contact with Robin who runs the MKM website, he is always on the lookout for 'new' MKM's. Can you post some photos? It's always nice to see a bike in question and, as they say, a picture is worth a thousand words - but I reckon that's a slight exageration!