Grading notes
Strike is part of the diagnosis.
Judge wear at the eagle breast, wing feathers, serpent, cactus, LIBERTAD band, and central rays only after accounting for weak strike, die wear, and adjustment marks.
Representative Republican issue study
1850 Do JMR Eagle-Style Transition
Two registry slots distinguish a small-eagle 1849–1850 style from a larger 1850–1855 style. This page treats them as one issue with two documented design states, demonstrating why a date–mint–assayer key still needs a major-variety dimension.
A mature diagnostic study selected from the complete matrix; neighbouring records stay matrix-only until they pass the same gate.
Verified image pendingNo neighbouring date, mint, or type is substituted
1850Date
DoMintmark
JMRAssayer mark
Unknown — not zeroMintage
Historical and mint context
1850 Do JMR Eagle-Style Transition
Two registry slots distinguish a small-eagle 1849–1850 style from a larger 1850–1855 style. This page treats them as one issue with two documented design states, demonstrating why a date–mint–assayer key still needs a major-variety dimension.
DoDurango Mint
JMRContextual assayer mark
KM 377.4Catalog crosswalk
2Normalized matrix rows
Unknown — not zeroReported mintage
Attribution diagnostics
Read the complete identity before grade or price.
- Compare eagle scale and body proportions, not a single feather.
- Check the fineness legend: the small-eagle registry label notes a 20G form without final S.
- Do not create a new series generation from an isolated minor die crack.
| Date | Mint | Assayer | Design generation | Variety classes | Confidence |
|---|---|---|---|---|---|
| 1850 | Do | JMR | Mid-century regional hub families | design-or-lettering-variety | specialist-registry |
| 1850 | Do | JMR | Mid-century regional hub families | design-or-lettering-variety | specialist-registry |
Authentication notes
Check cumulative compatibility.
Check the complete date–mint–assayer combination, die style, 27.07 g nominal standard, diameter tolerance, security edge, and .903 silver standard. This page is not a substitute for professional authentication.
Population and market evidence
No unsupported price or population snapshot.
No population total, survival estimate, or grade-price table passed the normalized, dated, multi-source publication gate.
Sources
Issue identity and series context.
- The Durango mintMexican Numismatics · tier 2 · 2026-07-21
Durango assayer names and documented service periods; design-transition context.
- Mexican 8 Reales, Circulation Strikes (1823–1897): Set CompositionPCGS Set Registry · tier 2 · 2026-07-21
1,112 date–mint–assayer–variety registry slots used as the primary issue-matrix crosswalk. Registry weights are not rarity estimates.
- 8 Reales – Mexico (N# 7394)Numista · tier 2 · 2026-07-21
Discovery and cross-check only: nominal 27.07 g, .903 silver, 38.9 mm reference diameter, security edge, orientation, and mint-level KM family suffixes.