This concentric design brass doorknob set was made by Barrows in the 1925 catalog. It is part of the M-1390 Geneva group. One knob is larger than the other knob, which is often the case with entry knobs. This uses set screws and has a split spindle. Priced as a pair of knobs with a spindle. The dimensions are Exterior knob 2.25 in. D x 2.5 in. diameter, passage knob 2.25 in. D x 2.25 in. diameter.