This 4-1/2 inch silvered glass Christmas ornament has an old style German tin cap, but the excellent condition may indicate that it was not imported to the US until after World War II, late 1940s to early 1950s.
It has a ribbed spike finial at the bottom and deeply embossed pinwheel center indents on both sides, outlined in white mica glitter. The colors are the earth tone shades of amber orange, brick red, and dark green that were popular German ornament colors popular just before and after the war. The ornament is in very good condition with only minor loss to the mica, no damage.
Antique German Indent Spike Glass Christmas Ornament