PANELS (AKA) by Unknown Maker (Unknown Location, Operated: Unknown), c1870s Introduced
NOTE: Sid Lethbridge 2022 - Ref. Pattern Glass Mugs, Mordock & Adams, p 96. Westmoreland Specialty c1917 is suggested as the maker and date but this mug likely dates to the 1870s with the maker yet to be determined. The example they show is 3-3/8" h and 2-3/8" d and is also cobalt. Both examples have 16 flutes around the body.
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Shape: Cups & Mugs
Contributor: Sid Lethbridge -2.18H and 1.78D

Shape: Cups & Mugs
Contributor: Sid Lethbridge Left - 2-3/4" tall, 2-1/2" diameter / Right 2-1/8" tall, 1-7/8" diameter.