Striking errors
Struck-Through Errors: Cloth, Wire, Thread, and Debris Explained
A struck-through error happens when something gets between the die and the planchet at the moment of striking. The die drives that object into the coin, leaving its shape or texture behind and blocking part of the design. Grease is the most common culprit and has its own guide; this one covers the solid stuff: cloth, wire, thread, staples, metal fragments, and other debris.
Quick answer
- A struck-through error shows an incuse impression of a foreign object, pressed into the coin by the die, with design missing or weak in that spot.
- Cloth leaves a fine woven texture. Wire leaves a thin, sharp-edged groove, often curved. Thread and fibers leave softer, wandering lines.
- If the object stays embedded in the coin, collectors call it a retained struck-through.
- Genuine strike-throughs sit under the struck surface: the surrounding design is fully struck and the metal shows no squeezing or displacement from outside force.
- Post-mint fakes made by pressing objects into a coin usually distort nearby design, flatten the rim, or leave marks on the opposite side.
How strike-throughs happen
The coining press works fast and under huge force. Anything sitting on the planchet or stuck to the die face at the moment of the strike gets pressed into the metal. The die design cannot reach the planchet through the object, so that section of the design is missing, and the object's own shape is left in its place. If the object falls away, you see its impression. If it gets embedded, you can see the object itself.
That makes strike-throughs a striking-stage error, distinct from die errors and planchet errors. Our overview of mint error types sorts them into those families. For the soft, smeary version caused by grease and dirt filling the die, see struck-through grease errors.
The common struck-through types
| Object | What it leaves | Key tell |
|---|---|---|
| Cloth | A patch of fine crosshatched texture, like fabric weave, in place of design | Regular, repeating weave pattern; often over a broad area |
| Wire | A thin groove with crisp walls, straight or curved, sometimes several crossing | Even width along its length; sharp edges |
| Thread or fiber | A thinner, often wandering line, sometimes with a twisted texture | Softer edges and irregular path |
| Staple | A distinctive bent-bar shape pressed into the surface | Recognizable staple outline, sometimes retained |
| Metal fragment | An irregular depression, sometimes with the fragment still embedded | Odd shape matching a sliver of metal |
| Split-off planchet piece | A depression from a thin flake of planchet metal | Smooth or irregular outline; related to lamination problems |
Cloth
Cloth strike-throughs are popular because the texture is so distinctive. The impression shows a woven pattern pressed into the coin where design should be. Depending on how much cloth was present and how thick it was, the area can range from a small patch to most of one face. The woven texture is the giveaway, but study it carefully under magnification: you want to see a consistent weave that sits naturally in the fields and devices, not a texture that looks like it was applied on top of an already finished surface.
Wire
Wire strike-throughs leave grooves of very consistent width with crisp walls. They can be straight, curved, or looped, and sometimes several pieces of wire cross each other. The groove should run through the design rather than over it: design elements are interrupted where the wire was, and resume cleanly on either side.
Thread and fibers
Thread and fibers leave thinner, softer lines than wire, often with a twisted or fibrous texture inside the groove. They wander more and may branch. Because these lines are fine, they are easily confused with scratches. The difference is that a strike-through line is pressed in and has a rounded or textured floor, while a scratch is cut in and often has raised displaced metal along one or both sides.
Retained objects
When the object is still in the coin, you are looking at a retained struck-through. These can be compelling, but they also invite the most scrutiny, since gluing or pressing something into a coin is not difficult. A genuine retained object usually sits flush or below the surface with metal flowed tightly around it.
Genuine strike-through or post-mint fake?
Anyone with a vise and a piece of fabric can press a texture into a coin. The difference shows in what happens to the rest of the coin. The core logic is the same as in our guide to mint error vs post-mint damage; here are the points that matter most for strike-throughs.
- Check the surrounding design. A genuine strike-through is part of one strike, so design right next to the affected area should be fully and normally struck. Post-mint pressing tends to flatten or distort the design near the impression.
- Look at the opposite side. Pressing hard enough to imprint cloth or wire into a finished coin often flattens or marks the other face. A genuine strike-through usually leaves the other side normal, apart from any weakness that the strike itself caused.
- Check the rim and edge. Vise work often flattens part of the rim or leaves jaw marks on the edge. Review the full edge, not just the faces; our post on full edge photography explains why.
- Study the luster and surface. On an uncirculated coin, the struck-through area should have the same general surface character as the rest of the coin, allowing for the texture of the object. Post-mint impressions often look different from the original surface.
- Ask whether the impression goes under or over the design. In a genuine strike-through, the object blocked the die, so the design is simply absent in that area. In a fake, you can sometimes see the original design flattened underneath the impression.
Don't confuse these with die cracks or scratches. A raised line is not a strike-through; it is usually a die crack, which leaves raised metal because the crack in the die filled with metal. A strike-through leaves an incuse (sunken) mark. See die cracks versus post-mint scratches for the raised-versus-sunken logic.
Documenting a strike-through
Strike-throughs are all about texture, which makes them tricky to photograph. A few habits help.
- Use low-angle raking light from two or three directions. Texture appears and disappears as the light moves.
- Take one overall photo of each face and one close-up of the affected area.
- Photograph the full edge, especially if anyone might suspect vise work.
- Avoid heavy sharpening or contrast filters that can create texture; our post on microscope settings that do not invent detail covers the same issue for magnified images.
- Write a plain description before you name the error: where the impression is, how big it is, whether it is incuse, whether any object is retained.
Researching interest without guessing values
We don't put values on specific coins. To research comparable pieces yourself, start with sold results for the same object type and denomination: sold struck-through cloth errors on eBay or sold struck-through wire errors. Then look for certified examples, since strike-throughs are an area where certification gives buyers real reassurance.
The factors that drive collector interest are the size and clarity of the impression, how identifiable the object is, whether it is retained, the denomination, the overall condition of the coin, and eye appeal. A small faint fiber mark and a bold, coin-wide cloth pattern are very different comparisons.
Tools for examining strike-throughs
A 10x loupe will show you cloth texture and wire grooves clearly. A stereo microscope helps if you want to study the floor of a groove or decide whether an object is retained. If you are deciding between the two, our loupe vs stereo microscope guide walks through the trade-offs.
Frequently asked questions
Is a struck-through error a die error?
No. It is a striking error. The die itself is normal; something got between the die and the planchet during the strike and blocked part of the design.
Why is a strike-through impression sunken instead of raised?
The object was pressed into the planchet by the die, so it leaves a depression. Raised lines on a coin usually come from cracks or damage in the die, which is a different category.
Can someone fake a struck-through cloth error?
Yes. Pressing fabric into a coin with a vise or hammer can imitate the texture. Fakes often show flattened nearby design, a marked opposite side, or a damaged rim. Have any expensive piece authenticated.
What is a retained strike-through?
It is a struck-through error where the foreign object is still embedded in the coin. These need close examination because objects can also be glued or pressed in after the coin left the Mint.
The bottom line
Verdict: Identify the object from the shape and texture of the impression, then test the rest of the coin for normal striking around it. A sharp design right up to the edge of the impression, an undisturbed opposite side, and an intact rim are the signs of a genuine strike-through. If the coin looks squeezed, it probably was.