1970 (S) Proof Roosevelt Dime - Repunched Mintmark RPM-004

Description

Cataloged by VarietyVista as UVC-550 with die marriage reference DMR-007, the 1970-S Repunched Mintmark RPM-004 is a proof Roosevelt Dime exhibiting an S/S Tilted repunched mintmark — a variety where the San Francisco mintmark punch was applied at two different rotational angles, producing a tilted overlay pattern between the primary and secondary S impressions. The die state progression lists Stage A with both obverse and reverse in early die state, Stage B as mid-die-state (unconfirmed), and Stage C as late die state (unconfirmed). Tilted repunched mintmarks generate a distinctive visual signature where different portions of the secondary letter show varying degrees of separation from the primary, creating an effect where the overlap appears to rotate around a central point rather than shifting uniformly in one direction. The 1970-S proof Roosevelt Dime was struck at the San Francisco Mint, the exclusive source of proof coinage since proof production resumed there in 1968. John R. Sinnock's design features President Franklin D. Roosevelt's portrait on the obverse and a torch flanked by olive and oak branches on the reverse. The coin is struck in clad composition (outer layers of 75% copper and 25% nickel bonded to pure copper; 91.67% copper and 8.33% nickel overall) weighing 2.27 grams with a 17.9 mm diameter and a reeded edge. The 1970 proof sets had a mintage of approximately 2.63 million, providing the collector population from which RPM-004 specimens can be sourced. The fourth cataloged repunched mintmark for the 1970-S proof dime sits within a family of RPM varieties for this date that includes both directional shifts and tilted rotations, documenting the full range of hand-punch misalignment geometries that occurred during die preparation for 1970 proof dime production.

Die Markers

• UVC-550
• DMR-007
• Stage A:
• Obverse and Reverse are EDS
• Stage B:
• MDS (unconfirmed)
• Stage C:
• LDS (unconfirmed)

External References