Interesting, I agree!!
Given I am building my ALPINA B2S tribute this topic is close to my heart.
My understanding is the only car that was sent direct from BMW factory to Alpina (for subsequent road use, not racing) was a clutch of those early carb csls ( if anyone can tell me how many , I would be grateful), which were transformed into the b2s, that had the large bold BMW ALPINA logo on the front quarters. mid 1972 ish.
The only other road going car, built by ALPINA at the same time that I have seen documented is the Barbasol CSL from all that famous article (documented here on the website). That one, has a version of the BMW CSL Stripe that is "thicker / wider" and incorperates the same BMW ALPINA , logo, within it (red stripe / silver or white bmw alpina logo). No mention of BMW 3.0 CSL in the stripe.
From there, you have e9's that were delivered to owners then at a later stage, delivered to Alpina for modifications.
Looking at the stripe above, my guess is it was not created by Alpina, but by the owner, post the Alpina modifications. Not to say the car was not tuned by ALPINA per se.
Other E9,s taken by their owners to be modified by ALPINA, in 74/75 etc, seem to have the early , bold Alpina Pattern running along the mid section of the car, rather than the guard. ( note the white car, with the BLUE/GREEN later pattern, often shown around the site...
For me, I am matching the early carb b2s spec as much as I can, therefore may aim is that the only difference will be, thicker gauge steel body and RHD. Along with an m30 that is actually 3.7, a 5 speed rather than 4 speed, a modern lsd unit within the diff , and progressive springs. thicker sway bars, and ALPINA front and rear strut brace.
I will post pics of thECARS i have mentioned.
Welcome all corrections / comments