Eames DAX Fibreglass  

Looks legit.
BK (Black) was first introduced in 1964 as a special order or contract color.
103091 is possibly the date (1991) That would make it near the end of production. The label looks very late also. DAX means dining height base.
So not old, but Black is a very desirable and relatively rare color.
Hope this helps!

Thanks so much for your feedback.
If possible are you able to provide me any feedback on my other post dealing with the Eames Wire Chair and if it looks legit.
Thanks again I really appreciate it
@Eameshead

Photos of the Wire Chairs attached. Do these look legit or copies. No markings on them but they came as the set with the above fibreglass chairs and apparently markings on these chairs stopped for a period of time.

To me, the wire chairs look very different from the vintage Eames wire chairs. Mostly on the underside. It's possible that the newer editions (or Vitra) might make them differently, as everything else that Herman Miller is re-making is also different from the originals. But my guess is they are not Eames chairs.
I can say that the table that the chairs are sitting around is a knock-off Saarinen table, so perhaps so are the wire chairs…
Hope this helps!