Hohner is both the best and the most frustrating name in accordion dating. Best, because in Trossingen the company has recorded a serial number on every accordion leaving the factory since 1930 — an actual, usable, continuous record. Frustrating, because that record is not published: it sits in Hohner’s own archive, and the company dates instruments one at a time, for a fee (currently around €40 per certificate). Here is what you can establish for free, and when it is worth paying.
What Hohner’s archive holds
For an instrument shipped roughly between 1930 and 1987, Hohner’s certificate gives the shipping date and the destination — and occasionally a lovely extra, the original purchaser. For instruments after 1987 the archive yields only the month of manufacture. Hohner does not value instruments. One caveat worth knowing before you send anything: Hohner never published a chart, and the number alone does not encode the year — so no third-party “Hohner serial table” can be authoritative either.
What the community has established
One free, public dataset does exist: a long-running community survey that maps roughly two hundred Hohner instruments dated between September 1934 and August 1941. Before adding it to this archive we checked whether it behaves like a single production sequence — and it does: when sorted by serial, per-year serial windows do not overlap, and the great model families of the era (Club, Preciosa, Liliput) all lie on one axis. That lets a number from 5027 to 929713 be placed in an estimated year window.
The estimate is honest but soft: the survey’s dates are fitted estimates, not factory records, and they widen across the war years. The archive labels them accordingly — try your number and read the confidence line.
Helping hands: letters and model years
Two secondary clues tighten the picture. From roughly 1981 to 2002, Hohner used model-letter eras — the N, S and T suffixed models — which set a rough floor for later instruments. And the model itself is a clue: Hohner’s 2006 catalogue of model production periods (reproduced in our model-by-year pages) tells you when each line was built, so your instrument cannot be older than its model’s debut. It also warns you when dating from the number is hopeless: Corona and Wiener models made before 2012 carry no serial numbers at all.
How to read yours, in order
1. Find the number — on Hohner accordions it usually sits on the rear of the treble side, the bass-side panel, or a small identification plate near the bass strap. 2. Run it through the archive lookup: if it falls in the 1934–1941 window you get an estimated year and era. 3. If it is a later instrument, use the model pages to bound it, and letters to place the era. 4. When you need the date to be provable — a sale, an insurance list, an estate — order the certificate from Hohner with the exact model name. This archive is the instant estimate; Hohner’s certificate is the proof.