E.K. Blessing built student and marching brass in Elkhart, Indiana from 1906.
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 38 dating ranges from 1906 to 1980, compiled from published maker records and reference charts. Coverage grows as new tables are verified.
Serial on the valve section — rear of the 2nd valve casing. 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.