Jeffries concertinas are the most prized of the Anglo tradition — and they have no serial numbers at all. Dating comes from the maker’s label: the workshop address changed over time (102 Praed Street → 23 Praed Street → 12 Aldershot Road), bracketing the instrument’s era.
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.
No public records — dated by features.
Open the serial lookup →No serial records survive for Jeffries — these observations place an instrument by what is on it. Each is sourced.
Jeffries instruments carry no serial numbers. Dating relies on label addresses and batch marks.
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.