Martin Original Series Acoustic Guitar Strings | 80/20 Bronze | Extra Light to Medium

The String That Started It All, Martin Original Series 80/20 Bronze

Martin's Original Series acoustic guitar strings are a piece of history. Back by popular demand after 50 years, these 80/20 Bronze strings are the composition that helped define the acoustic guitar sound, delivering deep, rich bass tones alongside clear, bright trebles that suit every playing style.

Providing brilliance and clarity in equal measure, the Original Series strings are well-suited to daily use, whether you're strumming open chords, fingerpicking, or playing lead. The light gauge M140 (12/54) is the classic choice, but the full range covers Extra Light through to Medium to suit your preferred feel and tension.

Available in Extra Light (10/47), Custom Light (11/52), Light (12/54), and Medium (13/56) select your preferred gauge from the options above.

Please note: Extra Light and Custom Light gauges are available while stocks last.

We ship via Royal Mail, EVRI, or ParcelForce with tracking, delivering in 2–4 working days; payments accepted via PayPal.

For full details, please review our complete shipping policy.

Returns are accepted within 14 days if unused, in original condition with tags and packaging—contact us for a return code.

No returns on microphones, in-ear earphones, or other items that touch the mouth, nose, or inner ear due to health and safety reasons, nor on custom orders or opened software.

Refunds are processed within 1–3 working days.

For full details, please review our complete return and refund policy policies.