I have a bunch of spokes that i want to use in a wheelbuild. I really would like to identify the spokes though. I have about 38 of one spoke, they are double butted and are 2mm at the threaded end, 1.8mm by the spoke head, and 1.6mm in the middle. They have a W or M on the spoke head, looks more like a W.

I have access to other spokes as well and wonder how can i identify the spokes without knowing their brands?