Hope this helps, however not sure if which you're looking for.

I have a 39-2, and the Wolff website did not differentiate between the 39 and the 39-2.

They did list stock number 69392 for the 39, 439, 539, 639 etc. I ordered it anyway. Just installed the extractor spring that was in the kit and functions perfectly.

I believe the 39-2 and 439 extractors are identical, hope someone can confirm?