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The Library · Discipline

Grading & Authentication.

The discipline of deciding what a piece really is, what condition it's in, and whether it can be trusted. Every serious collection rests on these three judgements.

The Principle

A great collection is built as much by what you reject as by what you buy.

The three questions

In Order, Always

Step One

Authenticate

Is it real? Compare diagnostics, weight, dimensions, surface texture, and design details against verified reference. If anything is off, stop here.

"Could this piece be a counterfeit, an altered date, or a problem coin?"

Step Two

Grade

What condition is it in? Wear, strike, surface preservation, originality of toning, signs of cleaning, and eye appeal — the elements that separate one example from another of the same type.

"Is the surface original — and does the grade justify the premium?"

Step Three

Certify

Should it be slabbed? Third-party certification by NGC, PMG, or PCGS provides verifiable grade and authenticity — and meaningful resale liquidity. Not every coin needs it; the right ones do.

"Will the slab add value commensurate with the cost and the risk?"

The guides

Five  Working References
No. 01
Counterfeit Detection The diagnostics that matter when checking authenticity — weights, dimensions, design transitions, surface texture, and the tells of altered or cast pieces.
Read
No. 02
Grading the ZAR Coinage Practical grading of Zuid-Afrikaansche Republiek issues — wear patterns, surface originality, common pitfalls, and what to expect across the series.
Read
No. 03
Certification & Grading for Modern Coins How third-party slabs work, when they add real value, and when raw is the better path. The economics of certification, plainly explained.
Read
No. 04
NGC Grading & Registry Guide How NGC certification, the Sheldon scale, and registry culture connect to South African collecting — and how serious collectors actually use them.
Read
No. 05
SANGS Grading Service South Africa's local grading service — how it works, where it sits relative to NGC and PCGS, and how to read its slabs against the international market.
Read

The trusted services

Verify Before You Buy
NGC The Numismatic Guaranty Company. Verify any NGC-slabbed coin's certification number directly with the issuer. Verify a coin →
PMG Paper Money Guaranty. Verify any PMG-slabbed banknote's certification number directly with the issuer. Verify a note →
The South African Numismatic Library A division of Jardines Galleries · © 2026