Borsini builds refined small-batch instruments in Castelfidardo. Model codes (e.g. “SL…”) identify the model, not the date; no serial table is public.
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 public Borsini serial table — model codes identify models; dating is feature-based.
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.