Martin 000-28 Guide

The zeros identify body size; 28 identifies the style. The familiar 000 measures about 15 inches across the lower bout, while 00 and 0 bodies are smaller. Check the measurements in the Martin model-number guide against the instrument itself. Case labels and sellers’ descriptions can outlive the guitar they originally accompanied.

For the familiar vintage steel-string 000-28, look for a spruce top, rosewood back and sides, and Style 28 appointments appropriate to its period. The soundboard’s edging changes across the model’s history. An attractive herringbone border is only one observation: it can belong to an early original, a modern recreation or a later repair.

Count the frets between the nut and body joint. A 12-fret body extends farther toward the neck than the familiar 14-fret form. Photograph the complete outline square-on, then measure the body and scale separately. The small-body history explains why the relationship among body, soundhole and bridge matters more than one isolated dimension.

The original OM-28 and the updated 000-28 are closely related, which makes 1934 a year to measure carefully. Martin’s museum describes the change from OM naming to the updated 000, followed by the 000’s move from long to short scale during 1934. Use the OM-28 identification guide for an instrument carrying the original OM designation.

Use approximately 25.4 inches as the long-scale reference and 24.9 inches as the short-scale reference. The OM-28 history explains the longer predecessor, and the documented 1934 example below confirms the shorter specification. Measure from the nut’s string-bearing edge to the center of the twelfth fret, then double that distance. The saddle is compensated, so measuring only from nut to saddle introduces an unnecessary variable. Record the result in inches or millimeters rather than relying on the owner’s memory of a published specification.

A documented 1934 000-28, serial 57851, provides a useful transition reference: the factory-record account places it in a short-scale batch with T-frets and steel T-bar reinforcement. That example supports the need to distinguish production groups within the year. It doesn’t establish the construction of every guitar stamped 1934.

Also measure the nut and string spacing. Neck width, scale, fret type and reinforcement are separate observations. A replacement fingerboard or neck can make a familiar measurement misleading, so include the heel, fingerboard extension and surrounding finish in the inspection photographs.

Classic pre-1947 Style 28 uses herringbone top trim in the house model history. Later 000-28s have simpler top purfling. Inspect the entire border where it meets the binding, particularly beside repaired cracks or a replaced section of top. A photograph of one undamaged corner won’t document the rest.

The 1950 and 1965 guitars here both illustrate post-herringbone production. Their rosewood backs, bridges, fingerboards and top trim should be considered as a group. A Style 21 can also have a spruce top and rosewood body; the Style 21 guide explains the different ornament and model history.

Brazilian rosewood identification needs more than a dramatic grain photograph. Ask for the complete back, both sides and the wood visible inside, and check that the serial, model and documented construction agree. Replacement backs and sides complicate a year-based assumption. The house dating guide’s transition is a starting point for examination, especially around the late 1960s.

Top color is similarly limited evidence. Aging, lighting, finish and repairs affect appearance. Don’t assign a red-spruce premium from a yellow or reddish photograph. Use dated construction information and an in-hand wood assessment when the species would materially change the description.

Scalloping is the carved profile of a brace. X position describes where the main braces cross. They need separate photographs. A rearward X can coexist with scalloped braces, and a guitar can acquire scalloping through later brace shaving. Follow the prewar inspection examples when requesting interior views.

Include the complete brace edges, glue joints and soundhole area. Look for changes in tool marks, interrupted aging and repairs around the bridge area. A fresh-looking surface warrants investigation; it doesn’t prove a particular repair without more evidence. Ask for invoices or the repairer’s description when the interior has been altered.

Document the bridge plate’s outline and pin holes. A cap, plugs, an oversized replacement or damage hidden beneath the plate can affect an otherwise attractive guitar. Exterior bridge work and interior plate work are different repairs. Describe both so that “new bridge” doesn’t conceal an unresolved question about the top underneath.

Neck reinforcement usually requires more than an exterior photograph. The Martin construction guide discusses late-1934 steel T-bars, wartime ebony substitutions, the 1967 square-tube change and later adjustable rods. The absence of an adjustment nut doesn’t distinguish all those nonadjustable systems. Preserve the uncertainty when repair records or an appropriate examination aren’t available.

The factory serial table supplies year-end totals. Keep the complete block photograph with your notes, including the surrounding wood. Routine model stamping began around October 1930 in the neck-block guide; an earlier serial-only block calls for measurements and period construction evidence.

The photograph above is Joe’s 1930 0-21, included as a clearly labeled small 12-fret body comparison. It illustrates the outline and neck-to-body relationship only. Its Style 21 trim must not be used to authenticate a 0-28, and it supplies no evidence about an unpictured guitar’s bracing.

Modern 000-28EC, Norman Blake, Golden Era, Authentic, VS, Standard Series and Custom Shop instruments need their full designation and actual manufacture year. A historical year in a recreation’s name describes an intended specification. The model-code guide helps separate that designation from a production date. Ask for factory paperwork when the stamp says CUSTOM.

Joe’s counterfeit Martin guide shows why a convincing headstock logo or plausible number is insufficient. Compare stamp lettering, logo, neck joint, body materials and internal construction. Request fresh photographs of the same guitar in every view; matching scratches and grain help connect the details to the complete instrument.

The counterfeit D-45 image is a comparison from that separate inspection guide. It is explicitly labeled because a Dreadnought is a different body family. Use it to understand the need to investigate inconsistent markings, not as a universal font rule for every Martin period.

Finally, check tuner screw holes and plate outlines using the tuner archive, then compare the headstock logo. Photograph binding joints, guard edges and finish around the bridge. Joe’s finish inspection guide explains the evidence needed before describing a surface as original.