Howdy,
Winsor bars are made in Milan, Tenn. USA. The company has been acquired by Blount, who also owns Oregon. The company started out in Vancouver, Canada, on Windsor street, which is why the name. It moved to Tenn. several years ago.
Carlton's Laminated bars are made in Tawian, and have the look about them as being by Chang Lim, who used to be the cheif engineer at Windsor in Canada! (If so they will be a 1075 material, spotwelded none to great). I need to confirm if indeed this is Chang's company. I heard he was making laminated bars. (The engineer at Carlton is Shane Behbahany, who used to be one of Chang Lim's engineers at the Langley plant when the company was in Canada).
The professional bars from Carlton are another matter entirely.
I believe Stihl's professional bars are still from Germany, but the laminated ones from Oregon/Canada. Am I correct on this? (Must have been a real trick to get Oregon to put that extra little piece on each side of the bearing race!)
That's Sugihara, by the way, and they always made a good bar body, but their nose assemblies were not as good as Windsor due to no coin on the tooth tip. I'm not up to date on them now.
Regards,
Walt Galer