Blue Stipple by Los Angeles N. S. Gustin Co MUG 3 3/4" sponge duck

Hard to find N.S. Gustin Co. Los Angeles Pottery Blue & White Stipple 3 3/4" mugs (sponged design). These have the center duck pattern. Condition is Excellent. I have 10 available, all are very nice, but used and are priced per mug. I will be listing a lot of pieces from this set.