That is my Bowie collection. The Thor was introduced in 2002 whereas the Trail Master goes back further.
"lobo9ner; Nice line up. They are sweet looking. Any chance SOG are same plant only ask because they sell Bowie looking pig stickers also of aus8.... As do many other companies I suppose."
Regarding SOG, Hattori made the original S1 and S2 bowies and their several limited editions.
The rest of SOG's fixed blades were made by Kinryu, also of Seki. SOG's folders have always been made by G.Sakai.
Cold Steel's Aus8/VG1/VG1Sanmai SRK and Recon Tanto are made by Kinryu. All the Japan made Cold Steel folders
were made by G.Sakai.
SOG's only real "big Bowie" was the Tigershark which was originally SK5 carbon steel with a convex grind. They later changed to Aus6.
SOG did not use Aus8 until after they moved production from Seki to Taiwan in 2006/2007.