2020-S Connecticut: Gerber Variable Scale Innovation Dollar Reverse Proof
Reverse proof struck at the San Francisco Mint · 49,172 made
- Mintage
- 49,172
- Metal
- Manganese brass
- Weight
- 8.1 g
- Diameter
- 26.49 mm
Original illustration. Tap to flip. Not a photograph of the actual coin.
Face value · Metal value · Small premium · Collector premium · Significant rarity. We use bands because prices change daily.
What is a 2020-S Connecticut: Gerber Variable Scale Innovation Dollar Reverse Proof worth?
Collectors pay a real premium for this date, worn or not, because far fewer were made than usual. Uncirculated pieces go much higher.
What would make yours worth more:
- Grade and, for proofs, strong cameo contrast
- A die variety or minting error
- Certification by PCGS or NGC, which buyers expect for scarce dates
For market prices, check recent sold results for certified coins in the same grade.
Quick answers
- Is the 2020-S Connecticut: Gerber Variable Scale Innovation Dollar Reverse Proof rare?
- Fairly. The Mint made 49,172 for collectors. Most were kept in their original packaging.
- Is the 2020-S Connecticut: Gerber Variable Scale Innovation Dollar Reverse Proof silver?
- No. It's manganese brass (88.5% copper, 6% zinc, 3.5% manganese, 2% nickel). Circulating silver dollars ended with the 1935 Peace dollar. Some Eisenhower dollars with an S mint mark were made in 40% silver for collectors, but circulation Ike dollars are copper-nickel clad.
- Where is the mint mark on a 2020 American Innovation Dollar?
- On the edge, incused with the date. On this coin the mark is S, for San Francisco.
- How many 2020-S Connecticut: Gerber Variable Scale Innovation Dollar Reverse proofs were made?
- 49,172.
What to check on your 2020-S
- Make sure the mint mark really is an S. A worn or filled mark can be misread. It's what separates your coin from the 2020-D (438,209 made).
- Judge the grade under good light. These are sold in rolls, bags and sets, so most survive uncirculated. Value depends on luster and freedom from marks.
The story of the 2020-S Connecticut: Gerber Variable Scale
Elsewhere in US coinage in 2020
West Point again struck quarters with a W mint mark for circulation, this time on all five 2020 designs.
How to recognize it
The Connecticut: Gerber Variable Scale design
The Gerber Variable Scale, invented by H. Joseph Gerber in the 1940s, is the subject of Connecticut's 2020 coin. The handheld device let engineers rescale graphs and measurements quickly, without tedious calculation. Gerber built on its success to found Gerber Scientific in Connecticut, whose automated design and manufacturing systems served many industries. The reverse shows the scale enlarging a geometric shape resembling the outline of Connecticut by 200 percent. Inscriptions read GERBER VARIABLE SCALE and CONNECTICUT.
The American Innovation Dollar design
The obverse shows the Statue of Liberty in profile with IN GOD WE TRUST and $1. Each reverse honors an innovation or innovator from one state or territory, issued in the order the states joined the Union. The date, mint mark and E PLURIBUS UNUM are lettered on the edge, which is where to look for the mint mark.
Mintage chart
Specifications
| Series | American Innovation Dollar (2018–present) |
|---|---|
| Year | 2020 |
| Mint | San Francisco Mint |
| Mint mark | "S" |
| Strike type | Reverse proof |
| Mintage | 49,172 |
| Face value | $1 |
| Composition | Manganese brass (88.5% copper, 6% zinc, 3.5% manganese, 2% nickel) |
| Weight | 8.1 grams |
| Diameter | 26.49 mm |
| Edge | Lettered with the date, mint mark and E PLURIBUS UNUM |
| Designer | Various artists |
Other 2020 American Innovation Dollar issues
Mintage: American Innovation dollars (Wikipedia, CC BY-SA 4.0), compiled from US Mint records and the Guide Book of United States Coins. How we build these pages.