How to Identify a Newcomb Macklin Frame?

Newcomb-Macklin picture frames were distinguished by their unique, perpendicular corner splines, a construction feature that prevented the corners of a frame from separating over time.

How do I know if my frame is gilded?

Check the back of the frame

Start with the basics. Turn the frame over and see if it's plastic or any material other than wood. If it's not wood, there's a good chance that the gold is not real gold leaf. That's because plastic and composite frames are nearly always fabricated to imitate the real thing.

How do I know if my frame is valuable?

Turn the frame to its back, or verso, and observe it carefully. If it is warped, fit with old hardware, or has wormholes, then it is probably old. Most picture framers do not duplicate warping or wormholes on the back of a new frame even if they distress its front to look old.