This is an American Mt. (Mt or Mount) Washington art glass mustard or condiment pot or jar. The age is late 19th century to early 20th century, or circa 1900.
The glass is ribbed. The top and handle are metal, pewter. The lid has a notch for the spoon. The handle has a small welding repair on the side. The design for this piece is for the handle to have an attached slot holder for a pewter mustard spoon, but these holders fall off over time. A prior owner took the trouble to repair the handle, to keep the handle strong though the little attachment is missing.
The outside of the glass is painted in pastel flowers, similar to wild roses, circling the jar. The flowers are in shades of blue and pink lavender with yellow middles and strokes of red - brown. The leaves are green. The vines are red - brown. There are small beads of blue enamel around the neck.
The pot or jar is 4 3/8" high to the top of the handle and 2" wide.
I refer you to the book, "Mt. Washington Art Glass" by Betty B. Sisk, and on page 237 you will see the same mustard pot, except with the little attachment on the handle intact.
There are a few scuffing marks on the glass and some oxidation patina wear on the metal. Plus there is the little repair on the handle.