1945 Gibson J-45
The 1945 J-45 — Gibson's most popular acoustic guitar. Round-shoulder dreadnought, mahogany back and sides, spruce top. The acoustic sound of country, folk, and rock.
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 | Mahogany back and sides, Sitka Spruce top |
| Neck Wood | Mahogany |
| Fingerboard | Brazilian Rosewood |
| Scale Length | 24.750" |
| Frets | 20 |
| Pickup Config | None |
| Bridge | Upper belly bridge (rosewood) |
| Tuners | Kluson Deluxe |
| Finish Options | Sunburst |
| Est. Production | 500 |
Pickups & Electronics
Acoustic guitar — no pickups.
What Changed in 1945
Wartime production. 'Only a Gibson is Good Enough' banner headstock. Limited materials but excellent craftsmanship.
Notable Examples
Bob Dylan, Donovan, Woody Guthrie — the J-45 is the folk/protest song guitar.
Collector's Notes
Banner-headstock J-45s are increasingly collected. Verify banner logo, original bridge, and tuners. Wartime examples may have unusual wood selections.
How to Authenticate a 1945 Gibson J-45
Gibson serial numbers from this era are ink-stamped on the back of the headstock. Cross-reference with known Gibson serial tables — numbering was not strictly sequential. Potentiometer date codes are critical: look for CTS pots (code 137) with two-digit year codes matching 1945 or up to 18 months earlier. This is the most reliable dating method for Gibson guitars of this era. The finish should be nitrocellulose lacquer showing age-appropriate checking (fine crazing). Under blacklight, original nitro fluoresces a distinctive green-yellow — refinished instruments lack this characteristic. Acoustic — no electric pickups. If a pickup has been added, verify it was not factory-installed (reduces value of vintage examples). Mahogany back/sides, spruce top. Check bracing pattern through soundhole. Verify bridge style and condition. Look for top cracks, bridge lifting, neck angle issues. Original Kluson Deluxe should be present with no evidence of replacement (no oversized bushing holes). Original hardshell case adds provenance value.