The GFRC Open Set Registry Community Project

Liberty Seated Double Dimes - Date and Mintmark

The Double Dime (or twenty-cent piece) was the shortest denomination struck for circulation in U.S. History. Easily confused for a Liberty Seated Quarter, the Double Dime was only issued for commerce in 1875 and 1876. After the coin was dropped for circulation issue, it was struck in proof format in 1877 and 1878 for collectors. Normally collected as a type coin (usually 1875-S), there are several ways a collector may pursue the series.

This is the basic date and mintmark set consists of just 6 pieces, including the proof-only 1877 and 1878. Even circulated examples of these coins are available if a collector wishes to build a complete circulated set.



Click Collection Name to view its composition. The Blank Collection is an empty version.

Collection Rating Complete Weighted Grade caccoin.com Last Updated
The JMFrzy Collection 52.5 100% 52.5 17% March 18, 2017
The Ray F Collection 23.3 67% 50.0 0% June 3, 2017
The Terry Hess Collection 18.1 67% 38.9 0% March 18, 2017
The Blank Collection
Collection Rating Complete Weighted Grade caccoin.com Last Updated
The JMFrzy Collection 52.5 100% 52.5 17% March 18, 2017
The Ray F Collection 23.3 67% 50.0 0% June 3, 2017
The Terry Hess Collection 18.1 67% 38.9 0% March 18, 2017
The Blank Collection

Rating: The weighted average of all coin grades (i.e. aggregated sum of each coin grade + CAC premium multiplied by its rarity factor divided by the sum of all rarity factors). Missing coins are included and assigned a grade of 0. This metric is the basis for order rank.

Complete: The number of coin entries divided by the total number of coins in the Set.

Weighted Grade: The weighted average of all coin grades (see calculation above), but excluding any missing coins.

%: The ratio of coins certified by CAC (either green or gold sticker). Calculated as the number of CAC coins divided by the total number of entered coins.

Rarity Factor: The rarity assessment for each date/variety uses the Sheldon scale of R1 through R8 with a R1 weight being the most common while an R8 weight being the most difficult to locate. Rarity estimates are by John Frost.