TBB Number
TBB Number is a catalog reference used to identify banknotes within The Banknote Book, a modern classification system developed by Owen Linzmayer to provide a more structured and detailed alternative to traditional cataloging.
It is not simply a number, but a coded reference that defines how a banknote is positioned within a hierarchy of country, issuer, and series.
How It Appears
A TBB Number appears as a structured alphanumeric code rather than a simple numeric sequence.
A typical example may look like B101a, where each part of the code carries meaning within the system — identifying the issuing authority, the specific banknote type, and its variation within a series.
Unlike traditional catalog numbers, it is not designed for immediate simplicity. Its structure becomes clear only when understood within the internal logic of The Banknote Book.
For collectors, the key is consistency. Each segment follows a fixed framework, allowing precise identification when comparing notes across the same system.
Functional Role
The TBB Number functions as a high-resolution classification system.
Where older catalogs often group similar banknotes under a single reference, the TBB system separates them into clearly defined entries based on issuing authority, series structure, and signature combinations.
This makes it particularly effective for modern banknotes and complex monetary systems, where multiple issuers or frequent design adjustments create layers of variation.
Rather than simplifying classification, TBB organizes complexity into a structured and readable format.
Why It Matters to Collectors
For collectors, the TBB Number reveals distinctions that may remain hidden in traditional catalog systems.
In many cases, a single Pick Number may group multiple signature varieties or minor design differences under one reference. The TBB system separates these into distinct entries, making each variation individually visible.
This level of detail allows collectors to identify differences that would otherwise be overlooked — particularly in modern issues or series with frequent administrative changes.
As a result, TBB does not change the existence of rarity, but it makes it easier to recognize.
For advanced collectors, it becomes a tool for precision — a way to move beyond general classification and understand how a series is structured in detail.
TBB Number vs Pick Number
TBB and Pick represent two different generations of cataloging.
Pick Number is the market language — widely recognized, simple, and universally used in trading.
TBB Number is the structural system — more detailed, more precise, and better suited to modern classification.
A simple distinction:
Pick defines the note in the market,
TBB defines the note in detail.
Related Terms
Frequently Asked Questions
What is a TBB Number?
It is a structured catalog reference used in The Banknote Book to identify and classify banknotes.
How is a TBB Number different from a Pick Number?
TBB provides more detailed classification, while Pick Numbers are simpler and more widely used in the market.
Who created The Banknote Book?
It was developed by Owen Linzmayer as a modern reference system for world paper money.
Is the TBB system widely used?
It is increasingly used among advanced collectors, particularly for modern and complex issues.
Do I need both TBB and Pick Numbers?
Yes. Pick Numbers remain essential for market communication, while TBB provides deeper structural understanding.