Hi Gianni,
Hope all is well. I would like to elaborate and share some of my conclusions which should hopefully shed light on your well noticed differences. So, although this Csl has Alpina parts and Alpina invoices to prove so......
Here we differentiate between those cars (extremely few) that went unfinished from the BMW factory directly to Alpina who completed the car as a B2/S with all their goodies as opposed to a lightweight carb Csl (or even any other E9 models) that an owner took to Alpina to get modified. In the second case the owner went thru the ‘wish’ list and bought what he liked, not necessarily everything on the list. With documents to prove what was added/ changed etc.
Most carb Csl’s had black hood and vent grills, radio, Momo steering wheel with Bmw horn button, Bmw shift knob, Alpina 7x14 rims, so whilst getting the upgrades, depending on the wish list, the basic Bmw parts remained unchanged like in this case. That the decals are misplaced after the restoration, as HB Chris also mentioned is unfortunate considering what the car and its price represent.
As always, Im only sharing what I’ve gathered and subject to refinement!
What might be misleading is that it says Alpina but not B2/S. It surely has Alpina parts installed by Alpina with dated invoices to back it up but the fine differences you’ve mentioned are to be found on a true factory Alpina B2S (like the Yannick Csl)