There are several companies that do that, but I don't know any that just do it on the spot and allow you to drop the item off. Typically you need to mail them in. KSA has offices in Vancouver, but only accepts via mail. Even then, KSA is seen as a secondary grader/authenticator. They may not actually add any value. You're better off with a higher end company. I'd do some research into who the industry standard is for Beatles autographs and go with them.
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