Am I legit?

I go through phases of thinking I want entire collection of Martha Stewart Living, from beginning to end. So I am always picking up back issues of her magazine at yard sales and thrift stores.

I picked this one up because it is pretty close to the beginning of the magazine.
It was stuffed FULL of old papers, including these two pages, which I am pretty sure are pages from her Entertaining Newsletter - the precursor to Living.

Inside, in an envelope, I also found this letter. (You can click to enlarge it.) It's a response to a question about her copper collection. She says she finds them at tag sales, flea markets, etc.

It's a real signature at the bottom, not a stamp.

But is it legitimately Martha's autograph?

What do you think?

This probably shows how boring my life can be but I think it is an exciting little mystery!