Factory chrome Lambert on E-Bay...Supabike???

Good spot! Looks very likely to be a Superbike frame to my eye. The only question mark I have is that the bottle cage mounts are brazed onto/into the frame on the Superbike, and therefore why would the cage need cable ties as on this one? (not impossible that he's a belt and braces guy , and it's screwed in and has ties to stop any movement?)

The other strange thing to my mind is that this model was meant to be a top of the range , shop window , drool-a-lot bike. If so, why let it leave the factory with a set of older, 'inferior' components on it? It doesn't seem likely even by Viscount standards does it? But then to imagine that the owner discarded the Dura-Ace components , but sort out older Lambert parts , also seems a bit odd. And we have plenty of previous evidence that Viscount did send a whole mish mash of things out of the door.

I wonder how/why the seller knows and lists it as Lambert? Is there a sticker, provenance/history from first owner?

All that said, I'd still bet a decent amount of money on it being a Superbike frame. In very good condition, but way over the top price.(or maybe that is the conversion rates nowadays, seeing as the £ isn't what it used to be)