Inner U Joint Seals

I figured it out. It was a leather seal. The seal I got from JK Howell is an o ting. So thats fine now.

Today I started taking apart on of the inner u joint housings. I'm not sure what that seal is under the spring. I have what I feel is all the seals I bought from J.K. Howell years ago but I don't see this thin seal under the metal washer looking item that the spring rides on. Can anyone help with tis. Thanks...