There could well have been Black S types, a relative has one and they obtained it as a NOVA import with 6,000 miles on it. There are no other colours evident on the side cover or tank to say it has been resprayed. Also, the factory records has the colour left blank.
Be careful with auctions as the 'provenance' on top priced bikes rarely matches the records when we check, some auction houses are worse than others. An S type went through Stafford a few years back and the only thing that could have been S type was the VIN plate, the rest did not match up at all. A recent Norton F1, never used on the road but refurbished in 2013, a MK3 ES Unregistered and sold by in 1975 that did not leave number 2 works until February 1976.
Be careful with auctions as the 'provenance' on top priced bikes rarely matches the records when we check, some auction houses are worse than others. An S type went through Stafford a few years back and the only thing that could have been S type was the VIN plate, the rest did not match up at all. A recent Norton F1, never used on the road but refurbished in 2013, a MK3 ES Unregistered and sold by in 1975 that did not leave number 2 works until February 1976.