Top and back bracing of an acoustic guitar. Looks like a rather large body for this one: possibly a Jumbo or an SJ size. There are a few variations from a traditional Martin-style bracing pattern: No Popsicle brace; the upper tone bar goes into the brace for the bridge; the finger braces appear spaced a little farther apart than normal. Also, the X-braces appear to be at 90 degrees. Usually the angle is less, so that the X-Braces extend farther vertically along the top.