Identifying Power Rib Mainspring Types?

[labnoti]

I have a couple of Smith & Wesson revolver mainsprings. Both were installed in revolvers by S&W, possibly by the Performance Center. One into a PC-branded gun, and the other may have been installed by the PC after sale. Both have a "power rib" corrugation.

I don't know if they are "Wolff" brand springs or if S&W makes their own springs following Wolff's patent. What I want to know is what kind of spring rate they might be.

I understand Wolff makes a Type II reduced power mainspring, and a Type I factory-rate mainspring. I believe the two would be distinguished by thickness.

Does anyone know the thickness of a factory or Type I mainspring? Or the thickness of a Type II spring?

 

[1911junkee]

AFAIK all springs in the major manufacturers revolvers are made by Wolf. Pretty sure I read that right here on this forum.
Been wrong before..........

 

[labnoti]

They look like Wolff, but what I want to know is what's the thickness of a standard or type 1 spring versus the thickness of a reduced power type 2 spring. It would be nice if Wolff would label their parts or at least color code them.