RICHardson Root Beer Glass Mug – Heavy, holds 9 ounces, Red Logo, Vintage?

Description

For auction is a very nice, heavy glass mug advertising
RICHardson Root Beer.
It has their logo in red on one side.
The measurements are 4-7/8 inches tall, 3 inches in diameter (OD) at the top, holds 9 fluid ounces and weighs 1 pound 10 ¼ ounces.
There is a little indented circle on the bottom - maker’s mark or flaw?
This mug is in nice condition, showing minor use with some dings and spots, also there a small line in the glass under the logo - flaw?
The decoration is in great shape; the red is not washed out.
According to my research, the Richardson Corporation began around 1915, and opened a root beer stand at Sea Breeze Amusement Park in Rochester, New York.
Thanks for looking!
PS regarding shipping – I will first pack this in a box, then into a flat rate padded envelope for security and economy.
Thanks!