1964 Quarter Pattern - RB-1125, INCO

Coin Details

Description

This INCO experimental quarter bears the RB-1125 designation, placing it within the 1100-series alloy family tested as part of the 1964 silver replacement program. The piece was produced during a period of intense activity at the Treasury Department, where officials were simultaneously managing the political challenge of legislative change, the technical challenge of alloy selection, and the logistical challenge of retooling the nation's coinage infrastructure. INCO's test strikes in the 1100-series helped narrow the alloy candidates by demonstrating which compositions could be reliably struck at high speed without excessive die wear — a critical production consideration for a denomination with annual mintages in the hundreds of millions.

Rarity Notes

Extremely rare experimental piece. The RB-1125 composition survives in very limited numbers, consistent with the restricted production runs typical of all INCO test strikes.

Cross References

Reed-Brenner RB-1125; NGC census