1876 International Exhibition. Rulau Pa-Ph 156, var--Overstruck on a Liberty Seated Dime--18 mm. Cho

1876 International Exhibition. Rulau Pa-Ph 156, var--Overstruck on a Liberty Seated Dime--18 mm. Choice Mint State.，As Rulau Pa-Ph 156, but dated 1876 instead of 1877 and overstruck on a Liberty Seated Dime instead of being produced on a silvered or gilt brass planchet. Deep pearl gray patina with iridescent highlights around the prooflike peripheries. A rare unlisted variant of an already scarce type, struck at the Mints display at the Exhibition on the historic first U.S. Mint steam press.，Collector tag included.，