How does a Doubled Working Hub Reverse occur?

A Doubled Working Hub Reverse occurs due to a misalignment or extra impression during the hubbing process, where the hub imparts its design into the working die. Once the affected die enters a production run, every coin it strikes carries the same diagnostic markers until the die is retired or replaced.

How do I identify a Doubled Working Hub Reverse?

Look for a secondary, slightly offset image of design elements such as lettering, dates, or device details. True doubling shows consistent separation across the affected area, unlike machine doubling which produces flat, shelf-like displacement. For confirmed Doubled Working Hub Reverse varieties, cross-reference the coin against the NumisDex catalog entry which lists known die markers and attribution details.

Are Doubled Working Hub Reverse coins valuable?

Value depends on the specific die variety, the prominence of the error, the coin's grade, and collector demand. Some Doubled Working Hub Reverse varieties are common and modestly priced, while others — especially early die states or dramatic examples — can command significant premiums. Check recent auction records and price guides for the specific variety.

Where can I find Doubled Working Hub Reverse varieties in the NumisDex catalog?

You can browse all known Doubled Working Hub Reverse varieties on NumisDex by visiting the catalog and filtering by the "Doubled Working Hub Reverse" error type. Each listing includes attribution details, die markers, and images when available.

Doubled Working Hub Reverse (WHR)

Q: What is a Doubled Working Hub Reverse?

A Doubled Working Hub Reverse (WHR) is a coin variety in the "Doubled Die Family" group. It results from an anomaly during die hubbing at the United States Mint. Coins exhibiting this error carry distinct diagnostic markers that distinguish them from normal strikes and are actively collected by error and variety specialists.

A Doubled Working Hub Reverse occurs when the working hub for a coin's reverse design receives two misaligned impressions from the master die during the hub creation process. Like its obverse counterpart (WHO), a WHR variety affects every working die produced from the doubled hub, resulting in consistent reverse doubling across multiple die pairs.

What Is a Doubled Working Hub Reverse?

The U.S. Mint's die production process follows a strict hierarchy: master hub to master die to working hub to working die. A WHR variety is created when the reverse working hub — the positive-image tool used to produce working dies — is impressed by the master die in two slightly offset positions. Every working die made from that hub carries the same doubling, and every coin struck by those dies displays it on the reverse. Wexler's doubleddie.com numbers these WWHR.

This hub-level origin is the defining characteristic that separates a WHR from a standard Doubled Die Reverse (DDR). A DDR exists on one working die. A WHR exists on the working hub and carries into all dies made from it, so the same doubling appears on coins from many dies.

How Does It Happen?

Creating a working hub means pressing the master die into a hub blank. Before single-squeeze hubbing was fully in use (Error-Ref puts that at 1997), this took more than one impression, and each re-entry of the master die was a chance for the two to shift relative to each other. Any shift was then built into the working hub.

The same classes used for doubled dies describe the result: a rotation grows towards the rim, an offset moves everything one way, a tilt affects one side. Whatever pattern the hub carries, every working die made from it inherits it, though wear and abrasion of each die can change how clearly it shows.

How to Identify a Doubled Working Hub Reverse

Identifying a WHR requires both visual examination and die-pair analysis:

Consistent reverse doubling: Look for doubling on reverse lettering (UNITED STATES OF AMERICA, E PLURIBUS UNUM, the denomination) and design elements (eagles, buildings, shields, or other motifs). The doubling should be uniform in direction and degree across all affected elements.
Often close doubling: Many listed WHRs show close spreads, extra thickness, or notches rather than widely separated images, so magnification helps. Wexler's 1989 cent reverse hub, for example, shows a spread towards the rim on E PLURIBUS UNUM.
Multiple die pairs show identical doubling: This is the conclusive diagnostic. If coins with different obverse dies show the same reverse doubling pattern, the doubling originated at the hub level. A single DDR, by contrast, is paired with only one obverse die throughout its service life.
Notching on letters: Close hub doubling often shows as notches at the serifs or corners of letters, in the same places on every coin from the hub.

Common Misattributions

Several phenomena produce reverse doubling that is not a WHR:

Machine doubling (strike doubling): Flat, shelf-like displacement caused during striking. It varies from coin to coin and is not a die variety. See Mechanical Doubling.
Die deterioration doubling (DDD): As a die wears from striking thousands of coins, the design elements become fuzzy and spread. This produces an appearance similar to doubling but lacks the crisp, consistent offset of a true WHR.
Die clash transfer: When obverse and reverse dies strike each other without a planchet, outlines of the other side's design are left on each die. They show on the coin as out-of-place outlines that do not follow the regular design.

Notable Examples

1941-S Mercury Dime WWHR-001

Wexler lists a 1941-S dime reverse working hub with a Class II spread on STATES OF AMERICA, the top of the axe, the upper leaves and berries, E PLURIBUS UNUM and DIME. It is cross-referenced as CONECA 1-R-II and was once listed in the Cherrypickers' Guide (removed in the 6th edition).

1946 Roosevelt Dime WWHR-001

The 1946 dime has doubled working hubs on both faces. Dies listed under the obverse hub (WWHO-001) are described as also showing the WWHR-001 reverse doubling.

1989 Lincoln Cent WWHR-001 and -002

Wexler lists two 1989 reverse working hubs: one with a spread towards the rim on E PLURIBUS UNUM, the other with doubling at the top of the statue's right knee. Several earlier 1989 doubled die reverse listings were renumbered when they were recognised.

Collecting Tips

Check the reverse: Collectors tend to look at the obverse first, so reverse varieties, WHRs included, are easy to miss.
Die-pair documentation: A WHR attribution is strongest when the same doubling is shown on coins from different dies. Two or more examples with different die markers provide that proof.
Match the die markers: Because the hub doubling is shared, die markers (scratches, gouges, polish lines) are what tie a coin to a particular listed die.
Pair with WHO varieties: Some years have doubled working hubs on both faces, as on the 1946 dime and the 1989 cent.
Study the listings: Wexler's doubleddie.com and CONECA's variety listings give diagnostics and photographs for attributed working hubs.

Doubled Working Hub Reverse