1970 C.F. Martin & Co. OM-28
A rare early 1970s special-order OM-28 with Indian rosewood. The OM format would not be formally reintroduced until 1990, making these interim examples unusual and interesting.
Current Market Value
* Prices are estimates based on recent market data. Actual value depends on originality, condition, and provenance. Pricing methodology
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Specifications
| Body Wood | Spruce (top), Indian Rosewood (back and sides) |
| Neck Wood | Mahogany |
| Fingerboard | Ebony |
| Scale Length | 25.400" |
| Frets | 20 |
| Pickup Config | None (acoustic) |
| Bridge | Ebony belly bridge |
| Tuners | Grover Sta-Tite |
| Finish Options | Natural |
| Est. Production | 30 |
Pickups & Electronics
Pure acoustic fingerstyle guitar.
What Changed in 1970
Sporadic special-order OM-28 production with Indian rosewood. The OM format was not yet formally reintroduced but custom orders were filled. Very small numbers produced.
Collector's Notes
Pre-reissue OM-28s from the early 1970s are curiosities — not part of standard production. Indian rosewood keeps prices moderate. Interesting to collectors of the OM format's history.
How to Authenticate a 1970 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 1970, 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.