Alas, despite my 19 Congress decks from around 1900, I do not have an original Congress deck with a Dundreary joker. I do have a used Dundreary joker with some charming markings on it.
Oct 2023 - Auction action update. There was a nice old deck, late 1800, in the 52 Plus Joker auction. Good condition. I decided to bid on it since I really wanted a real Dundreary deck and joker. I decided to bid up to $500. The bidding ended up being me and the Congress Guy. I dropped out at $475. So I'm still looking.