The pin in the handle of the first is metal but i don't see a signature on the sword anywhere. And also, the first was made in China but it does NOT say stainless steel anywhere. The other two were made in Taiwan and ARE stainless steel.
The first measures to be 19 inches. (blade only, no hilt)
The second measures 12 inches. (blade only, no hilt)
And the third measures 9 inches. (blade only, no hilt)
The first blade is inscribed with "Now and past there is a God that respects ambitious men" in Chinese characters.
The second has what looks like a signature but it is chinese so i have no clue what it says.
Also, I have no clue what a Tang is. lol. or temper lines for that matter.