
The pearlized flips:
Came in two sizes: 5 5/8" x 3 1/2" and 4 5/8" x 3".
They are known to exist in a soft blue, soft green, and rich burgundy and purple (pictured below, left).
The finish is slightly marbled -- though it's impossible to tell if this is from wear and washing -- and it definitely has a pearlized sheen/lustre that is unique among flip glazes.
The wear suggests that the lustre-like glaze was low-fire and has not held up well over time.
The pieces are reminiscent of Frank Lloyd Wright's lustre glass and with the exception of the burgundy, the palette is atypical of most commercial ware.
Backstamp was either Utilities Specialties Co. Inc., Jersey City, N.J., or as below:
The one seen below left and in detail below has the most unusual surface design of all in that it appears to be mauve and green marbled.
This is the large size with a backstamp that says:
Utilities Specialties Co. Inc.
JERSEY CITY, N.J.
U. S. A.
The stamp on the lid is similar to the one above, but looks smaller.

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