Long sleeve purple sweater with swing inset at back

This sweater is somewhere between purple and burgundy (colour is closer to true in 3rd photo, rest are over exposed to show details). The inset at the back is of a drape-y material, and creates an interesting effect. Sweater is older, and was worn and loved, so is only in good shape, but does not show any pilling anywhere, so there is still life in her!