Pls help - is this genuine?

[simplyjp]

Hi there,
I’m looking at this 2nd hand Cannondale super six in Singapore, and the seller has provided a photo of the serial number.
however the serial number doesn’t register a hit on Cannondale’s website.
Any help to assess whether this is genuine or not would be much appreciated!
link here: https://carousell.app.link/oqM09KjEBhb

 

[black lightning 1987]

Looks like a Cannondale to me. Post pictures of the bike and as many of the components as possible. I will try to figure out what year and model it is.