Some examples are unembossed and some examples are embossed on the front skirt "PAT. NOV. 1870". These mini's are unattributed to any known patent or glass house.

Colors shown: left to right, Cobalt Blue, Ice tint, Yellow, Clear

1 5/8" x 1 3/8"

The far right example has the embossing [010] (F-Skirt) PAT. NOV. 1870