We've seen salvage-wood frames from bigger retailers before, but they're usually the paint-flecked boat wood we've come to expect from the material. We're loving these we found on Etsy, which are paint-free to show the muted beauty of the wood on its own.
The pine or fir frames have been sanded, but otherwise left untreated. These would hang beautifully in multiples.
• Barnwood Picture frame by Paradise Hill Designs