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
1840 Go PJ Republican 8 Reales
The 1840 Go PJ is a mature Guanajuato regional-mint test case. Its exact licensed image shows how local eagle, wreath, cap, ray, and punch styles can diverge while the national denomination and fineness formula remain recognizable.
A mature diagnostic study selected from the complete matrix; neighbouring records stay matrix-only until they pass the same gate.
1840Date
GoMintmark
PJAssayer mark
Unknown — not zeroMintage
Historical and mint context
1840 Go PJ Republican 8 Reales
The 1840 Go PJ is a mature Guanajuato regional-mint test case. Its exact licensed image shows how local eagle, wreath, cap, ray, and punch styles can diverge while the national denomination and fineness formula remain recognizable.
GoGuanajuato Mint
PJContextual assayer mark
KM 377.8Catalog crosswalk
1Normalized matrix rows
Unknown — not zeroReported mintage
Attribution diagnostics
Read the complete identity before grade or price.
- Read Go as Guanajuato only in this Republican date-and-denomination context.
- Confirm PJ beneath the cap-side legend rather than inferring a person from initials alone.
- Compare strike weakness at the eagle breast and cap center before calling wear.
| Date | Mint | Assayer | Design generation | Variety classes | Confidence |
|---|---|---|---|---|---|
| 1840 | Go | PJ | Early upright-eagle local-die families | base-issue | 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.
- 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.