That is an LG1, it and the LGO are the ones that came with the not adjustable saddle on a plastic bridge, notice there is no center seam pad on the back just inside the soundhole. The B-25 had a center seam pad and came with the adjustable saddle. Some did come with the plastic bridge but not in 66. The LG1 is the Ladder braced the B-25 is X braced.