2024-S Maine, Reverse Proof Proof

San Francisco struck 30,000 examples of the 2024-S Maine Reverse Proof, the lowest-mintage strike format of the four 2024 Maine issues and tied to the 2024 American Innovation Reverse Proof Set production run. The figure is well below the 32,000 reverse proofs San Francisco struck for each of the four 2023 state designs and continues the program's gradual reverse-proof contraction since the 49,298 ceiling held across 2022. The reverse proof finish inverts the standard cameo geometry: the design devices, here Phebe Hemphill's profile portrait of Dr. Bernard Lown and his direct current defibrillator below, take a polished mirror finish, while the surrounding fields are struck with a frosted, matte texture. The inversion suits the composition: with Lown's portrait and the cardioverter rendered in mirror polish against a matte background, the device that defined modern resuscitation reads more like an engraved plaque than a struck coin.

Reverse proof production requires specially prepared dies, polished on the relief surfaces and frosted across the field, which consumes more die life per coin than standard proof preparation. That extra cost is part of why reverse proof mintages run a fraction of standard proof mintages across the Innovation series. The 30,000 figure for the 2024 Maine Reverse Proof is the lowest reverse-proof mintage in the program to date, a step down from the 32,000 ceiling the 2023 issues held. The drop is not Maine-specific; it reflects the Mint trimming its 2024 reverse-proof set target to match the softening collector demand the entire modern dollar program has seen since 2022.

For set builders the 2024-S Reverse Proof is the scarcest of the four Maine strike formats by a wide margin (roughly 1 reverse proof for every 27 standard proofs and 1 for every 37 Philadelphia or Denver circulation strikes), but the badge remains Regular because the reverse proof is a strike-format distinction, not a key-date scarcity in the traditional sense. Original 2024 American Innovation Reverse Proof Set packaging is the cheapest entry point; certified PR69 and PR70 examples trade at modest premiums in TPG, the third-party grading service, holders, with PR70 the practical ceiling. For broader program context, see the American Innovation Dollar series history.