Selections from The Variety Coin Register

Italian Doubled Die Obverse & Reverse
Found In Pocket Change
Copyright Ken Potter 2002

Obverse Doubling
See More Of the Obverse Here

Reverse Doubling
See More Of The Reverse Here

Subject:  Italy 1975 100 Lire

Variety Coin Register Number: VCR#1/DDO#1/DDR#1

Cross References:  None Known

Description: Obverse: The variety shows very strong doubling of the obverse on REPVBLICA ITALINA, the laurel leaves in the wreath on Italia’s head, some hairlines, esp., at the top of the head, the inscription below the truncation, and the rim on the right side of the coin. Reverse: The reverse displays very strong doubling of much of the profile of the goddess Minerva, sprig in right hand, spear in the left hand, the denomination; L.100, the "R" Mint mark and rim on right side. The lack of any doubling of the date indicates that it was undoubtedly entered into the otherwise completed die in a separate operation independent of the conditions that caused the hub doubling to occur on the balance of the design.

Submitted by: Mark Fox of Michigan, - comments welcome; listed September 2002.

Additional Comments:  Hub doubling is possible due to a phenomenon known as work hardening. This causes the metal of the face of a die to become too hard and too brittle to allow a complete image to be sunk into the die in one operation without causing it to crack or shatter (during the multiple hubbing process). As a result, several impressions or hubbings are required to produce a die when using this process. (The multiple hubbing process was replaced in many world Mints recent years by the more modern "single squeeze" hubbing process. The process now employed in the Italian Mints is currently unknown to this writer). Between each hubbing the die is removed from the press and annealed (softened) thus allowing for another impression without shattering the die. If for some reason a partially finished die is reinstalled into a press for strengthening and the hub and die is improperly indexed, resulting in a misalignment of images, or if the hub varies in design from the one(s) used for earlier impressions -- hub doubling will result.

For more information on this item click below:
Send email to:

Ken Potter
P.O. Box 760232
Lathrup Village, MI 48076-0232

Phone: 1-(313)255-8907 E-mail:

Numismatist Since 1959 ~ Serving the Collector Since 1973
CONECA's Longest Serving Doubled Die Attributer


Ken Potter's Variety Vault
Educational Image Gallery
Who Is Ken Potter?

Unless otherwise stated, all Photographic Images are by Ken Potter.   Copyright Ken Potter, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002.  Use of images in any manner is strictly prohibited without the express written permission of the copyright holder.

Free counters provided by Andale.