Martin OM-21 Acoustic Guitar
- Model: OM-21 Acoustic Guitar
- Back & Sides: East Indian Rosewood
- Top: Spruce
- Neck: Select Hardwood / Modified Low Oval Shape / High Performance Taper / Ebony Fingerboard / Dark Mahogany Color Neck
- Nut: 1 3/4″ Bone Nut
- String Spacing: 2 5/32″
- Bridge: Modern Belly – Drop in Saddle (Ebony)
- Bracing: 1/4″ Spruce – Scalloped X-Brace Pattern
- Scale Length: 25.4″
- Binding: Brown Tortoise Pattern
- Rosette: Multi-Stripe
- Fretboard Inlay: MOP Style 28
- Tuners: Nickel Open Gear
- Electronics: None
- Purfling: Style 18
- Pickguard: Tortoise Pattern
- Finish: Gloss
- Case: OHSC
