Syd Barrett

Syd used this guitar on the last song he would record with the Pink Floyd, “Jugband Blues” from the 1968 album A Saucerful of Secrets. The guitar can be seen in the music video of the song [Pink Floyd – Jugband Blues].

According to David Gilmour, who at that time covered for Barrett’s eccentricities, talked a little bit about the guitar they used during the A Saucerful of Secrets era:

"At the beginning we used Levins, which were quite good guitars, a bit like Martins, made in Sweden or somewhere, then we moved onto Martin D-35s and things like that and now we tend to use Ovations mostly for recording and things. [Guitar Heroes #9 May 1983]". Source: https://www.groundguitar.com/syd-barretts-guitar-and-gear/#1961-selmer-futurama-iii

Syd Barrett is pictured with a Harmony Sovereign H1260 acoustic guitar, as shown in a user-uploaded photo on Wikimedia.