The Crabb family built concertinas in London from the 1860s into the modern era. Crabb ID numbers are not a public ledger, but Geoffrey Crabb has published reference ranges, and instruments dated 1937–1939 literally begin with their year. This archive carries the published gallery points and the numbering rules — no guessing beyond them.
The record makes room for uncertainty when a precise year is unavailable.
Factory and production era appear alongside the date when supported by a source.
See the source behind a match and what still needs to be confirmed.
The archive currently covers 1 series and 11 dating ranges from 1908 to 2004, compiled from published maker records and reference charts. Coverage grows as new tables are verified.
The exact spot varies by era and instrument type — the serial number guide walks through the common locations.
Recheck the characters exactly as marked, including any letters and leading zeros. Letter-prefixed numbers often belong to student or non-domestic lines that cannot be dated from the number. Some production periods may simply not be covered yet.