Morgan Peace Weight Checker
Compare independently identified original Morgan/Peace standard silver-dollar issue mass to nominal 26.73 grams. Modern commemorative/bullion issues excluded; actual tolerance independently verified, not authenticity.
Description
Original Morgan and Peace silver dollars have a nominal mass that can be compared with a measurement.
Original Morgan and Peace silver dollars have a nominal mass that can be compared with a measurement.1
A mass match needs an identified original issue and does not itself authenticate a coin.
When to use Morgan Peace Weight Checker
Use this tool to calculate or review the supplied observations under the stated rules. Establish the coin issue, source edition, measurement basis and reference date where applicable.
How to use Morgan Peace Weight Checker and understand its results
- Establish the coin issue, source edition, measurement basis and reference date where applicable.
- Enter observedMassGrams, callerApplicableToleranceGrams, using the field meanings and rules below, then run the tool.
- Read result. Inspect nested result fields where present, and review unknown records separately from known matches.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedMassGrams | Observed mass grams | number | Required |
| callerApplicableToleranceGrams | Caller applicable tolerance grams | number | Required |
Require observed grams>0 and caller tolerance≥0. Subtract 26.73 grams and compare absolute difference inclusively with the tolerance. Modern issues are outside this nominal reference scope.
difference=observed−26.73; within=|difference|≤tolerance Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Calculated observation or qualified reference | object |
| result.nominalMassGrams | nominal Mass Grams | number |
| result.signedMassDifferenceGrams | signed Mass Difference Grams; preserve the subtraction order and sign defined in the mechanics | number |
| result.withinCallerMassTolerance | within Caller Mass Tolerance | boolean |
{
"input": {
"observedMassGrams": 26.73,
"callerApplicableToleranceGrams": 0.02
},
"output": {
"result": {
"nominalMassGrams": 26.73,
"signedMassDifferenceGrams": 0,
"withinCallerMassTolerance": true
}
}
}Limitations and assumptions
Coin identification, reference applicability and measurement uncertainty require separate evidence. A returned explanation or arithmetic agreement does not establish authenticity, a certified grade or a current market value.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Trade Dollar 420 Grains Checker: Coin mass can be compared with the nominal standard of an independently identified issue. For a complementary comparison, use Counterfeit Density Flag Checker: Bulk density is mass divided by volume and can be compared with an issue-specific reference interval.
References
-
Morgan Peace Weight Checker — tool.io
Similar or alternative tools
- Trade Dollar 420 Grains Checker
Coin mass can be compared with the nominal standard of an independently identified issue.
- Counterfeit Density Flag Checker
Bulk density is mass divided by volume and can be compared with an issue-specific reference interval.