1964 Quarter Pattern - RB-1135, INCO

Coin Details

Description

The RB-1135 experimental quarter is part of INCO's extensive 1100-series alloy testing, conducted as the United States faced its most serious coinage materials crisis since World War II. By 1964, the market price of silver had risen to the point where the metal content of dimes and quarters approached their face value, incentivizing hoarding and melting. This test piece represents INCO's response to the Treasury's urgent need for a viable alternative, exploring yet another copper-nickel alloy formulation on Washington quarter planchets. The piece demonstrates how the RB-1135 alloy reproduced the quarter's design elements and edge reeding under standard striking conditions.

Rarity Notes

Extremely rare experimental issue. Individual RB compositions in the 1100-series typically survive in quantities of one to five pieces.

Cross References

Reed-Brenner RB-1135; NGC census