Fourth quarter 19th/early 20th century.
One example with a horizontal hairline to font and lower base, remaining example undamaged. One burner undamaged, remaining lacking wick tube, chimney-shades undamaged.
9 3/4" H to top of chimney-shade, 5 3/4" H to top of collar.
The collection of Larry Spradley, Beaumont, TX.
Parallels Hulsebus - Miniature Lamps of the Victorian Era, p. 96, fig. 204.