4,5,6
http://www.sears.com/yost-4inch-forged-steel-bench-vise/p-00946539000P?prdNo=4
http://www.sears.com/yost-5inch-forged-steel-bench-vise/p-00904651000P?prdNo=1
http://www.sears.com/yost-6inch-forged-steel-bench-vise/p-00904654000P?prdNo=3
I found one kind of sketchy site say they were from Taiwan. I sent a message to Yost and I'll wait to see what they say.
The Ridgid Forged steel vise is made in germany, and looks very similar, but is only rated at 75,000 PSI, compared to the Yost 90,000 PSI.
http://www.amazon.com/dp/B001T9J68I/?tag=atomicindus08-20
The bessey forged vise is made in Turkey, and doesn't look similar to the Yost/Ridigd, but is also rated at 90,000 PSI.
http://www.grizzly.com/products/6-Heavy-Duty-Drop-Forged-Vise/T25644
Even if the Yost is made in Taiwan...... It's hard to go wrong with a 90,000 PSI tensile strength vise (seeing as how the expensive USA made cast iron ones are only 65,000 from Yost). It also comes with a 5 year warranty, which gives me confidence over those imported box store brands that have 90 days...
EDIT: Got a reply to my email (on a Sunday nonetheless!)
"Call Ryan on Monday to discuss further the merits of the FSV-6.
Taiwan. USA recognizes Taiwan as a TAA (Trade Act Agreement) Compliant country. Labors in Taiwan cost more due to stringent labor laws set up to protect workers and guarantee a safe work place. Labor laws are lax in China so companies exploit such and hire cheap, less skilled and less knowledgeable workers. Result is less consistency in quality in Made in China products. Taiwan's quality is superior to China's quality"
I'll probably chat them up tomorrow and see what they say. They obviously don't put as much confidence in the FSV vises as they do their iron American made (5 year warranty v lifetime respectively).