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I'm gonna say it was probably re-pinned. I thought that may have explained the two solid washers. Thanks again for the answers. It was a curiosity.

That makes sense. Thanks!!

A few of the razors i've taken apart had a fifth collar, both times on the pivot end.

Check out the pic.

The top 3 collars were all on the back side of the razor, two stacked on top of each...