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1973 C.F. Martin & Co. OM-28

A 1970s special-order OM-28 — Indian rosewood, long scale, 000 body. The OM was not in Martin's standard catalog but was available by request. Uncommon but not extraordinarily rare.

Current Market Value

Excellent
$5,500–$11,000
Very Good
$3,500–$5,500
Good
$2,200–$3,500
Fair
$1,100–$2,200

* Prices are estimates based on recent market data. Actual value depends on originality, condition, and provenance. Pricing methodology

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Specifications

Body WoodSpruce (top), Indian Rosewood (back and sides)
Neck WoodMahogany
FingerboardEbony
Scale Length25.400"
Frets20
Pickup ConfigNone (acoustic)
BridgeEbony belly bridge
TunersGrover Sta-Tite
Finish OptionsNatural
Est. Production35

Pickups & Electronics

Pure acoustic fingerstyle guitar.

What Changed in 1973

Special-order OM-28 — the Orchestra Model was occasionally produced on special order through the 1970s. Indian rosewood, long scale, 000 body. Very low production numbers.

Collector's Notes

1970s special-order OM-28s are interesting historical pieces that bridge the 57-year gap between the original run and the 1990 reissue. Check documentation for special-order verification.

How to Authenticate a 1973 C.F. Martin & Co. OM-28

Martin serial numbers are the most reliable in the industry — verify the number stamped on the neck block (visible through the soundhole) against Martin's published tables. For 1973, the number should fall within the documented range. Indian rosewood back and sides — verify correct grain and coloring. Non-scalloped X-bracing pattern for this era — verify through the soundhole. Orchestra Model — verify 25.4-inch scale length (longer than the similar-looking 000-28). Check for neck resets, top cracks (especially near soundhole and bridge), and bridge plate condition. Tuners should be Grover Sta-Tite. Finish should be nitrocellulose lacquer with age-appropriate wear. Original case adds value.