Diagnostic Controls & Presets Modern Specialty Die Varieties • Attribution Lab
Diagnostic Forensic Readings
Forensic Attribution Diagnostic
Real-time metallurgical and die variety cross-examination verified against certified populations.
Technical Breakdown: Physics, Metallurgy & Die Diagnostics
Wavy Steps Micro-Abrasion Physics
Wavy steps are caused during die maintenance when an abrasive stone or rotating polishing wheel is applied to clean die clash marks or gouges from the recessed steps on the die:
The uneven pressure of the abrasive wheel selectively disfigures the straight incuse step ridges, resulting in coins displaying rippling, sinuous, undulating steps on the Lincoln Memorial.
Trail Dies Mechanics & Directional Vectors
Trail dies are created during single-squeeze hubbing when the master hub drags slightly against the working die blank under rotational pressure:
The dragging motion carves micro-grooves into the die face that translate into fine raised lines resembling comet trails extending from letters in 'LIBERTY' and the date.
Documented Benchmark Auction Records
GreatCollections Certified Auction. Superb Gem with dramatic ribbon-like wavy undulation across steps 2 through 5 of the Memorial.
Heritage Auctions Variety Session. Strong directional trail lines trailing southwest from the word 'LIBERTY'.
Normal 2003 Lincoln Cent without wavy steps from a circulation mintage of over 3.8 billion coins.
Frequently Asked Questions
What are 'Wavy Steps' on a coin?
'Wavy Steps' is a recognized die variety found on certain Lincoln Memorial cents and Jefferson nickels where the building's steps appear undulating, wavy, or distorted rather than crisp and straight.
What causes the Wavy Steps variety?
They are typically caused when mint employees use abrasive polishing stones or rotary tools to grind away die clash marks from the die, inadvertently grinding into the straight step grooves.
What are 'Trail Dies'?
Trail Dies are a modern die variety where fine, raised, parallel lines trail away from letters, numbers, or design elements, resembling tails on comets. They are caused by the hub dragging against the die face during single-squeeze hubbing.
Which years are best for finding Wavy Steps and Trail Dies?
Wavy Steps are most common on Lincoln cents from 1994, 2003, and 2004, as well as 1939 Jefferson nickels. Trail Dies are prominent on cents from 2004 through 2009 and State Quarters.
How much are Wavy Steps cents worth?
Circulated examples sell for $5 to $15, while uncirculated Mint State (MS-65 to MS-67) specimens range from $35 to over $200.
How can I detect Trail Dies on my coins?
Examine the coin under 10x to 30x magnification with angled lighting. Look for fine parallel ridges extending outward from the corners of letters in 'LIBERTY', 'IN GOD WE TRUST', or the date.
Do major grading services attribute Wavy Steps and Trail Dies?
PCGS and NGC attribute major recognized varieties (such as the 1939 Monticello wavy steps and prominent Lincoln varieties), while specialized services like ANACS attribute virtually all cataloged trail and wavy step dies.