Move from the documents to the zodiac gold coin
Start with the stated weight, diameter and metal information, then identify the source of each figure. Keep evidence visible on the coin distinct from packaging, certificates and oral accounts, preserving both when they disagree.
Separate years or editions within the same zodiac series and give every coin an identifier. Explain the effect before any examination that would touch the surface or enclosure.
Match each accessory and document to the coin inside its box. Name positions that cannot be viewed safely and stop a measurement that would require unplanned opening or handling.
The identity of an owner or date of a transaction does not alter the evidence required: both faces, edge, dimensions and packaging need individual coverage.
Distinguish stated specifications from actual measurements
Cite the source for nominal weight, diameter and gold content, then place separately observed measurements alongside them. Printed specifications are not themselves test results.
Preserve the original box, certificate, receipt and seal as comparison material. Check that their wording and numbers correspond to the enclosed object.
Separate year and edition before comparing a series
Transcribe the year, denomination, issuing authority, subject and visible wording. A recurring zodiac design can appear in more than one year, so the subject alone cannot identify an edition.
Assign a different number to each coin. Keep the obverse, reverse, edge, weight, diameter, box and certificate connected to it.
Match evidence inside and outside the holder
Photograph a sealed or graded holder, its closure, label and number before considering whether it should be opened. Change the angle of light to manage reflection rather than disturbing the package.
Describe fingerprints, contact marks, scratches and discolouration as seen. Do not clean, rub or use an image filter to make the gold appear brighter.
Do not open original packaging without a defined reason
Commemorative status, metal information and preservation are separate questions. Popularity of the subject cannot establish composition or condition.
Images may organise editions and packaging, while minute surface evidence and the state inside a seal can still require direct examination.
A focused check for a Chinese zodiac commemorative gold coin
Begin with the original box, certificate and seal. Keep stated weight, diameter and metal details together with the coin number, while locating contact marks, scratches and every surface area visible through the enclosure.
For a group, confirm the relationship between each accessory and the enclosed coin. Record the two designs, edge and surface individually; use a group photograph only to verify quantity.
Save each reading with its instrument and unit, and locate every close-up on a complete face. If one of those connections is missing, postpone the dependent conclusion.
Before opening, touching or testing, identify the location and possible effect. Maintain the current surface and enclosure until the need has been agreed.
Finally review the dates, units and image orientation across specifications and observations. Retain both versions when earlier documentation and later examination disagree.
