Do you have a 1969 Accessories Borchure? If so, it'll show the various caps that were available, and on what models. Even though it's a US brochure, applicable to US cars, but you can see whether that cap was available on a B body.
The wheelcovers at the start of the thread are 69-70 Firebird and A body (Tempest, LeMans, GTO) and were named Deluxe. They were optional on all Firebirds and A bodies both years and included with the decor group. They were not available on the Grand Prix or any of the B body big cars.
The wheel cover shown in the previous post was the standard 2+2 only wheelcover. It is basically the same as the American one but with a different center cap. Actually even the wheelcover itself is made slightly different but barely noticeable. I never liked this model because it doesnt fully cover the wheel, leaving a half inch of the wheel showing all the way around, making it look like the car has 13 wheels.