I think, before joining the Stones, Taylor played on three Mayall albums - Crusade, Bare Wires, and Blues From Laurel Canyon.
When I saw Mayall at Brighton Dome in the early 2000s, Gary Moore was the surprise guest.
And it has exciting provenance ...
'I have had this bass for 20 years or so. I bought it in the USA for on a guy who had been the bassist in an unsuccessful Sub Pop band - and whose name I can’t remember although he told me he had played it on their one single.'
... that's OK then.