Rare 60s Standel guitars
Mosrite guitars promotional print
Rare vintage Gretsch guitars
Coral (vintage Danelectro) guitars
Let me add that they are so dark for a reason: they will drop way into the background, you still see enough details. It’s like wearing shades, dig? The size is 1280×1024 pixels.
You can also get my surf music related (partly) desktop icons here.