Intaglio Mint Exclusive – Error Coin – Series 1 – “Clip-Curve” – .999 Fine Silver – Limited Mintage: 1,000!
Error coin collecting offers the coin collector an opportunity to learn a more detailed understanding of the manufacturing process, and in turn refine their knowledge and hone their skills in recognizing the finer details of their existing collections and broaden their interests.
By identifying errors in planchet fabrication, striking mishaps, and die failure, the basic knowledge of the minting process gives way to a more sophisticated, complete understanding.
Acquiring and studying the numerous varieties however can be an expensive, timely, and often exclusive undertaking. And while everyone should be encouraged to take the opportunity to do so, for the joy and knowledge numismatics provides, we would also like to increase the education and enjoyment to a broader audience.
In the forthcoming issues, Intaglio Mint will offer a comprehensive collector set of error coins fabricated using the very techniques that lead to accidental error coins. Varieties will be released in various Types (Planchet, Striking, and Die) and Classes within those Types in order of complexity of fabrication. For example, common errors such as clips and off center will be released prior to multi planchet errors such as brockages with final production runs of die failure errors, cuds and die clashes, being last. Pricing is tied to the level of complexity involved in the error creation. Albeit controlled, these are not standard minting practices and require an expert knowledge of minting processes in order to maintain safety and quality standards.
Series 1 – Clip-Curve
The term curved clip describes a planchet error that occurs when a blank is punched from an area of the strip that has already been previously punched. This is usually a result of the strip being mis-fed into the blanking press. The resulting blank overlaps the previously punched hole resulting in a crescent shape of varied percentage of material missing. Because of this, multiple clips, as well as overlapping clips do occur.
One of the main diagnostics to recognize a true clip is called the “Blakesley Effect”. When a clipped blank is run through an edge mill or upset mill, the pressure applied to the edges of the blank upset the material by applying pressure on opposing edges of the blank towards the center. When the blank has a clipped area, there can be no pressure applied to the opposing side of the missing material. This lack of pressure leaves the area opposite the clip with no upset or deformation. This portion of the planchet that is not upset lacks material to properly fill the die during striking of the coin, resulting in a weak area directly opposite the clip. A coin that has been clipped or filed after striking does not exhibit this characteristic.
Occasionally, due to strong strike pressure, ductile material, or the size of the clip (larger), the “Blakesley Effect” can be difficult to diagnose. Collectors should be very careful to learn the diagnostics of a true clip, as it is easily, and frequently, faked by clipping or filing a coin after it has left the mint.
Metal: .999 Fine Silver
Diameter: at 30mm
Quality: Brilliant Uncirculated
Design: 1916 “D” Winged Liberty
Year of Issue: 2017