Stonhenge II woofer ID

[MikeSayre]

I pulled woofers from my cabinet that are shown in the two top pictures. I bought some (without checking, silly me) that the seller identified as Stonehenge II (and they may have been), shown in the two lower pictures. Which are the genuine article?

[Alien_Shore]

Do you have any part numbers from either woofer?
The picture from the 1975 catalog (http://www.lansingheritage.org/images/altec/catalogs/1975-home/page07.jpg) is hard to tell, but doesn't look like either of the woofers you show.
There is an excerpt from a 1975 service catalog (http://www.lansingheritage.org/images/altec/reference/1975-drivers/page04.jpg) that indicates the replacement woofer P/N for Stonehenge II is 33555. Given that 33555 is checked as "replace" vs repair usually means it is one of the 3rd party sourced components (not an Altec manufactured woofer). Those pictures you show reinforce that. That doesn't necessarily mean that the driver is low-quality or poor performing; consider that the highly-regarded Altec Model-14 also has a 3rd-party woofer.