I did this photo years ago. Two speedlights through DIY diffusion panels (one for each side), some black foamboards as flags to block the diffused light on the neck, a small mirror to bounce some light on the strings to create those highlights, and a white foamboard to bounce a bit of light on the brand's name (but not enough to correct expose it on purpose to give this look), after that, just some dust removal and RAW conversion.
