I would research this a bit. Looks like you have a wood/gesso frame. Some of them can go for a pretty penny (meaning more than $50 - up to several hundred), especially the larger ones and uniquely shaped ones!
Frames from before the Art Nouveau period are worth more! You generally see them gilt but can find them painted over (not worth as much).
They don't follow a particular style. Wood patterned blocks were used to imprint designs.
