Diagnostic Controls & Presets First US Copper-Nickel 5-Cent Piece
Diagnostic Forensic Readings
Forensic Attribution Diagnostic
Real-time metallurgical and die variety cross-examination verified against certified populations.
Technical Breakdown: Physics, Metallurgy & Die Diagnostics
Tonnage Req: P ≈ 65 Tons (vs 35 Tons for Silver)
The extreme hardness of the 75% copper / 25% nickel alloy required nearly double the stamping tonnage of 90% silver half dimes, causing the thin dies to fracture rapidly between the intricate rays and stars.
Specific Gravity: 8.92 ± 0.04 g/cm³
Authorized by the Act of May 16, 1866 to replace Civil War fractional paper currency and unhoard small payments. Weight must be precisely 5.00g with a diameter of 20.5 mm.
1880 Proof Strikes: 3,955 (Proof-dominated year)
Due to enormous existing circulating stockpiles from the 1866-1869 production runs, the Philadelphia Mint produced almost no business strikes in 1880, making uncirculated survivors exceptionally rare.
Documented Benchmark Auction Records
Tied for finest known with blazing satiny mint bloom and complete definition on all 13 rays and obverse cross leaves.
Rare transitional gem surviving in full unblemished condition; pristine cross details with no trace of die clashing.
Ultra-rare business strike from the tiny 16,000 mintage; intensely frosty surfaces with champagne peripheral iridescence.
Frequently Asked Questions
What is the difference between the 1866 and 1867 Shield Nickels?
The 1866 Shield Nickel features 13 prominent radiating rays placed between the stars on the reverse. Early in 1867, the US Mint removed these rays from the hub because the hard 75% copper / 25% nickel alloy was causing the dies to shatter after only a few thousand strikes. Therefore, 1867 nickels exist in both rare 'With Rays' and common 'No Rays' varieties.
Who designed the Shield Nickel and why was a shield chosen?
The Shield Nickel was designed by US Mint Chief Engraver James Barton Longacre. The obverse features a patriotic Union shield with crossed arrows, laurel branches, and a cross at the apex, symbolizing the preservation of the Union following the bloody American Civil War.
What is the most valuable and rare Shield Nickel?
The two rarest regular-issue Shield Nickels are the 1867 With Rays in Gem Uncirculated condition and the 1880 business strike (mintage of only 16,000). Furthermore, pattern varieties like the 1867 With Stars Proof (Judd-566) and the 1883 over 2 overdate command six-figure auction results.
Why are Shield Nickels so often found with die cracks and weak strikes?
The 75% copper and 25% nickel alloy is extraordinarily tough and work-hardens rapidly when stamped. The Philadelphia Mint's presses struggled to fill the deep recesses of Longacre's high-relief shield design, and coin dies frequently cracked, clashed, or sank, leaving many genuine specimens with incomplete cross-hatching or pronounced die breaks.
What is the official weight and diameter of the Shield Nickel?
The Shield Nickel weighs exactly 5.00 grams (77.16 grains), has a diameter of 20.5 millimeters, and features a plain, unreeded edge. This exact 5.00 g / 20.5 mm specification has remained the legal standard for all five-cent US nickels from 1866 to the present day.
How can you tell if an 1867 With Rays nickel is counterfeit?
Common counterfeits involve adding rays to a genuine 1867 No Rays nickel or casting fakes from lead/tin alloys. Authentic 1867 With Rays specimens exhibit distinct die polish lines around the stars, proper 5.00g weight (±0.1g), and crisp internal ray borders rather than soldered or engraved lines.
Why did the Shield Nickel replace the silver half dime?
During the Civil War, citizens hoarded all gold and silver coins, forcing the federal government to issue frail paper fractional currency ('shinplasters'). Industrialist Joseph Wharton owned the largest nickel mine in the US (in Lancaster County, PA) and aggressively lobbied Congress to create base-metal coins made from nickel, leading to the 1866 Act establishing the 5-cent nickel coin.