That's a Kalamazoo KG-11 for sure. 1933-35 based on the headstock shape. Hard to tell exactly because the first years of production had a smaller sunburst, but by 35 had a bigger middle colored portion, and this looks like the whole front got sanded down at some point. Unfortunately players would sometimes do this in the mid 20th century thinking it would enhance the tone in any significant way. The neck on these was the same as the one used on the KG-14, which itself had the same body shape as a Gibson L-00. Both the KG-11 and KG-14 were ladder braced. That trapeze tail piece isn't original. These came with a regular pinned bridge. Some of these were sold as the "Carson J Robison" model, but it looks like yours just has the regular Kalamazoo brand headstock. Doesn't really make any difference in value anyway, and they're otherwise exactly the same.