I still doubt it.
1.Dunlop name is part of the logo with D, not only the D. (this is a common tric used by fake manufacturers)
2. Dunlop is now owned by Sumitomo and Goodyear. They use logo in full " D DUNLOP ". Even then to have the D only they got to have a new mould. What for?
3. Doubt they would manufacture an air spring for a niche market like P38.
4. After 2014 Dunlop does not manufacture tyres in ENGLAND let alone an air spring.
5. It came in a Eurospares bag not a Dunlop one. Any seller would happily sell it in a Dunlop bag.
Seller of course is the cheapest & quick in delivery but not always genuine.
Once he sold me a Hella starter motor for my P38 which the site said new, genuine part. But when I got it, its clearly marked remanufactured. On inquiry , they wanted me to return it. I couldn't do it as the shipping cost was higher than the total cost I paid in the first place. He sold me Terrafirma shockabsorbers, made in Taiwan even the rubber bush is painted.
A VC coupling said to be OEM came from Br..tpart.
Yet I buy from him as cheapest & quick delivery

. Before ordering I usually check ebay fake prices with shipping.
