@john_hamster

This link to a forum entry here might help, https://community.tp-link.com/en/home/forum/topic/532054

There was also a V2 and that is what the link is about, and I'd assume the V2.6 is possibly slightly different too?

I assume a TP-Link Moderator might answer you, but you could also use these resources that might give you an answer:

  @IrvSp 

Thanks for that link...also have noticed two distinctly different black plastic case features of routers each having the AX-3000/AX-55 model no., depending on the vendor...Best Buy, Amazon, Ebay, et al.  Wondered if the appearance difference matched up with version type.