i no longer have Ned Schwing's book on the superposed but my recollection is he wrote that being head of the engraving department Funken had the prerogative of signing any gun that left the shop, and there were so many "Funken" guns that it wouldn't have been possible for him to have done them all. however, there's certainly no reason he couldn't have done it. I've only owned one pigeon and it wasn't signed period.