Awhile back, I sent a Russian colleague of mine (also a teacher) some materials. I asked her to save the envelope and send it back. Unfortunately, it arrived back to me in this condition! It's creased but I still find it interesting. However, due to it's condition would it be better to just do a hatchet job and keep the stamps?

Now, to make things interesting. I sent this to her registered mail and I have the receipt for it!

Does this make any difference in value or interest? I was thinking to trim it a bit and try to fit it into my album.