Loetz Dark Blue Phänomen Genre 377, PN I-8080, ca. 1900

Phänomen Genre 377 is an early PG decor, introduced in 1900. It comes in various colors, and within that, in two varieties. One variety has the marvered metallic granules running approximately halfway up the exterior of the vessel, and in the other version, the granules completely coat the exterior. Photo number 3 here shows both versions. This taller dark blue one is about 9" tall.

For more varieties and colors of this decor, see the PG 377 page on Loetz.com here:
https://www.loetz.com/decors-a-z/phaenomen-genres/phaenomen-genres/pg-377