Rare vintage Japanese horse mug by Flavia Weedn Papel 'On this day celebrate'

Collectible and rare mug for coffee or tea Reddish purple stamp-like image of a horse, maybe a carousel horse, and the phrase "On this day, celebrate" blank on the other side of the mug Standard mug size and shape stamped on bottom for brand and manufacturer, Flavia Weedn, Papel Inc, exclusively licensed in Japan very good used condition, no big scratches or chips