Looked up some examples online, the Townshend looks pretty close to some but the Daltrey looks off. I also see some similarities in the autographs which makes me worry, would love your opinions:
Thanks. After looking at the signatures together and not just individually, I could tell they were likely done by the same person. Seller bought this off eBay and I was skeptical before he sent me the pictures because the seller had only private listings.
I would think signing on the grooves would make it likely for the paint pen to 'catch' in the groove and interfere with the flow of the signature as it's being signed.