Further to Davy F's post about Alpina wheels I contacted the UK supplier to ask for a few details about their spokes - given the drama we all face at the moment with the Honda OEM ones.
They replied as follows:
"Our spokes are made from high strength carbon steel - these are then zinc-nickel coated
The zinc - nickel coating has better rust properties and finish than stainless steel
Alpina have been making spokes since 1926 and its a little known secret that Alpina supply spokes to most of the major motorcycle brands
The Alpina wheel department is only 20% of Alpinas business , the other 80% is spoke production
In the unlikely event of issue in the future we will supply replacement spokes FOC"
They also provided links to two videos about the wheels:
Front:
https://www.youtube.com/watch?v=mCbBAorWHxI
Back:
https://www.youtube.com/watch?v=R4JE7NNwf_w
I have no connection whatsoever with this company.