The Martin OM-28

Vintage Guitar. Graded secondary. Open the original.

Not archived. Via summarising fetch: OM introduced 1929; OM-28 five-year run, 487 units; OM absent until a 1969 special run, OM-21 returned 1993. Conflicts with 1930 in S399/S400. Added 2026-10-15 by llm:claude-sonnet-5-5.

What it supports

1 fact on this site cites this source, across Martin. A quoted passage is the text the fact relies on.

Fact	Years	Records	Passage
Martin OM^[1]	introduced 1929	Martin	No passage captured

More secondary sources

Sources

Every numbered marker on this page points here: the document, its grade and the passages relied on. An era is computed, so it cites the facts it was derived from. A fact marked “no source” has no claim attached yet.

1
The Martin OM-28graded secondary

See something wrong, or know a better source?