


© Image courtesy of the United States Mint
1 Dollar American Innovation - Connecticut
2020 yearManganese brass clad copper | 8.1 g | 26.49 mm |
Issuer | United States |
---|---|
Period | Federal republic (1776-date) |
Type | Non-circulating coin |
Year | 2020 |
Value | 1 Dollar (1 USD) |
Currency | Dollar (1785-date) |
Composition | Manganese brass clad copper |
Weight | 8.1 g |
Diameter | 26.49 mm |
Thickness | 2.00 mm |
Shape | Round |
Technique | Milled |
Orientation | Coin alignment ↑↓ |
Updated | 2024-10-09 |
Numista | N#225134 |
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Rarity index | 16% |
Reverse
This reverse design depicts the Gerber Variable Scale being used to increase a geometric shape by 200 percent, a shape which resembles the State of Connecticut.
Script: Latin
Lettering:
UNITED STATES OF AMERICA
GERBER VARIABLE SCALE
CONNECTICUT
Engraver: Renata Gordon
Designer: Richard Masters
Edge
The year of minting (2020), mintmark, and inscription “E PLURIBUS UNUM” are incused on the edge of the coins.
Lettering: 2020 P E PLURIBUS UNUM
Comment
Before the invention of the graphing calculator, scientists needed a clear, quick, and simple solution to understand and solve problems of scale. The invention of the Gerber Variable Scale was that solution.Heinz Joseph Gerber (1924–1996) invented the device while studying aeronautical engineering at Rensselaer Polytechnic Institute in 1945, a few years after escaping Nazi-controlled Austria with his mother. The earliest version of the variable scale had been fashioned from an elastic band removed from a pair of pajamas. Gerber created a rubber rule and scale that could flow with a curve, expand, contract, and turn a corner. It allowed for the direct numerical reading of curves, graphs, and graphical representations.
Because of its ease of use and quick solutions, the Gerber Variable Scale was a huge success, and by the 1950s, it was considered the universally accepted tool for engineers and architects all over the world.
Interesting fact
The Manganese brass clad copper coin is resistant to corrosion and has a longer shelf life than other metals.
Price
Date | Mintage | VG | F | VF | XF | AU | UNC |
---|---|---|---|---|---|---|---|
2020 D | - | - | - | - | - | - | |
2020 P | - | - | - | - | - | - | |
2020 S | 50000 | - | - | - | - | - | - |
Values in the table are based on evaluations by sales realized on Internet platforms. They serve as an indication only for 1 Dollar (American Innovation - Connecticut) 2020 coin.