Size:  QUART

Color:  BLUE-AQUA

Closure:  zinc cap

Appearance:  shiny glass

Condition:  edge flaking on the ground mouth (one is not yet detached)

Embossing: strong, and note the backwards-embossed "N" in the DUPONT logo, a mold-maker's error

Base: a large "G" logo enclosing a "1X", indicating that the manufacturer was the Gayner Glass Company of Salem, NJ

Age:  late 1800's

Availability: a rare proprietary brand Mason jar