The top signature is from a 3/84 letter and the bottom is from an 8/84 letter. The letters are four paragraphs in length and are identical except for the third paragraph. The letters are general "thank you for writing" in theme while the third paragraphs reflect the current state of the Phillies. I'm not familiar with circa 1984 Mike Schmidt signatures but eleven years into his MLB career, I find it hard to believe he would take the time out to personally sign such letters so I assume they're secretarial. Am I right?
