As pointed out in the Scott U.S. Specialized Catalogue, at least in the edition I have, Seebeck made one of the reprints of the New Haven Postmaster Provisional. Therefore, there are Seebeck reprints in U.S. Philately.
Further, the Hamilton Bank Note Company, during Seebeck’s period of involvement produced stamps for the Postal Telegraph Company, Scott #15T. Shown here are some proofs and stamps. As in previous posts, all these items are from the Bill Welch collection.

Trial color Die Proofs, India paper on card.

Additional Die Proofs and some Specimen stamps.


Scott # 15T3 and some other values.