Version 1.7.5 Available Now

CoinScope Pro now does World Coins and the Ancient World. 62 countries and ancient issuers written out by hand and about 560 more with their currencies, beside the Roman lookup: 113,206 ancient and historical types, searched by whatever scrap of legend you can still read. All on your own computer.

See what it does →
Varieties › Devices › right dot

Doubling on right dot

8 listed varieties show doubling here, across several series and dates. That is worth knowing before you get excited about one coin: a device that doubles often is a device where doubling is common, and where machine doubling imitates it most convincingly.

DesignationSeriesClass
1936-P DDR-016Lincoln CentII distorted hub doubling
1947-D DDR-001Roosevelt DimeII distorted hub doubling
1957-P DDR-002Roosevelt DimeII distorted hub doubling
1964-P DDR-006Roosevelt DimeI rotated hub doubling
1964-D DDR-011Roosevelt DimeII distorted hub doubling
1965-P DDR-004Kennedy HalfII distorted hub doubling
1939-P DDR-010Lincoln Cent
1961-P Pr DDR-001Roosevelt Dime

The same device, coin after coin

Doubling on right dot looks similar across dozens of varieties, which is exactly why eyeballing it misleads. Measure the displacement instead and the differences stop being a matter of opinion.

What it measures

This is a reference, not an attribution. It narrows the field and names what each die is identified by; deciding that a coin is one of them is done with the coin under a lens, by a person, against the markers. Nothing here grades a coin or says it is genuine, and the wording is written from structured facts rather than copied from any catalog.
Gen M.
Typically replies within a day
Hello, and welcome to CoinScope Pro. Click the button below to chat with us on Messenger.
Send a message