Here is my meager collection of Haskett bases....the one in the middle was found last month. And an insitu of it. I figure it would have been in the 5" range.
A pic of what I opine is a Haskett/Cougar Mtn found by my Dad. But this one is reworked/sharpened down to the shoulders. Flaking and cross section plus grinding to shoulder fits Haskett. Next to it is a 2 1/4" lance that has percussion flaking to a median ridge with the correct cross section and ground 1/2" with pressure retouch. I used to think it was a Haskett but now I classify it as an early Lake Mojave variant.
Lastly one I have shown before in What in the World section. A nearly 8" artifact found on a small paleo site with Lake Mojave bases and scrapers and spokeshaves. It is percussion flaked with grinding on the lower 1/3 of the haft adges. I always thought it was a tool from a Haskett tool kit. But who knows?
So, it is my opinion, that this patriarch of the GB paleos is very rare to find complete and broken as well. I would find it hard to believe that someone has as many Haskett bases as Arrow does other than maybe Mojave.
I hope others post their finds it would be nice to see other examples.