Marked Mid-century Cobalt blue Smithsonian Institution Souveneir pottery mug 1$

Marked Pottery Cobalt blue mug Smithsonian Institution Souveneir 1$ Mid-century 50s Vintage Bennington Pottery in vermont has a stunning indigo glaze with no flaws. Thr front is embossed (raised). The last series if photos is how it was made. Bottom has incized mark A perfect collectible Approx 41/8"h×4"wide (handle)