All twelve of these unsilvered American made glass Christmas ornaments were produced during World War II. From 1942 through 1945, all metals were needed for the war effort, so ornament manufacturers switched to using painted, sprayed, and flashed-on decoration rather than silver nitrate.
The non-round ornaments include two Shiny Brite ringed tornado shapes, one with white mica glitter and one with a sprig of wired tinsel inside. There's also a painted red bell and a 4-1/4 inch Premier blue with white windowpane decoration teardrop, both with tinsel inside.
The other eight ornaments are classic round or ball shape, 2-1/4 to 3 inches diameter. They're all decorated with horizontal rings or stripes, some with mica glitter. The hot pink with white stripes ornament has tinsel inside. Two ornaments have cardboard or paper pulp caps with string hangers, also a result of wartime metal restrictions and shortages.
Three ornaments have quite a bit of finish wear: the bright yellow has flaking, the opaque green has scratches to the painted stripes, and the Shiny Brite clear with yellow, red, and white mica decoration has loss to the transparent red paint. The others are in good condition, none have any chips or breaks. At the time these ornaments were made, I don't think much thought was given to the durability of the applied finishes. They were never intended as a permanent product line and the use of silvering agents resumed almost immediately after the war.