Squier History
The following is information I found on eBay, and found interesting. It does not mention anything about Samick.
I know that some Squiers were made by Samick, and Musician's Friend used to offer a Rogue Strat that was made in the Indonesia Squier factory. It has Rogue by Squier on the headstock. I think the bottom line is who gives Fender the low bid to make them. I have seen Squiers from Japan, Korea, China, and Indonesia. I'm not sure if there were ever any Mexican made Squiers.
One of the most unsual Squiers I've seen had the standard "Fender" logo in large letters on the headstock and "Squier Series" in smaller letters. It is not uncommon to find used guitars in pawnshops and guitars shows, that are cheap Squiers that someone has installed Fender necks, or even worse, a Fender decal. I've seen some pretty convincing fakes. This allows the seller to subtitute a plywood body for a good solid one, and keep the better electronics, while ripping off the buyer. This is why Epiphone changed the shape of thier headstock, to prevent fake Gibsons.
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In 1982, the Fender division of CBS established Fender Japan in conunction with Kanda Shokai and Yamano music.
http://www.guitarz-for-ever.com/Ultimate-guitar.html
Production of Squier instruments began in 1983 at Fugi Gen Gakki in Matsumoto, Japan.
What was intended as a European Commodity soon became a way for Fender to provide entry level instruments.
Squier Bullet guitars and basses were originally produced from 1983-1988, and only recently revived.
They originally featured Telecaster-style headstocks with "Squier by Fender-Bullet/star" logos.