To aid the search, the company has provided a list of specs to look out for if you think you've come across McCartney's long lost instrument, which includes a solid spruce top and a three piece neck, as well as, quote, two diamond logo pickups and no poles. End quote. Another dead giveaway is the Hofner logo. The group says, quote, written vertically on the headstock of the original model, but horizontal on later versions, which played by McCartney