Black mark on plate please look at pictures

The Vintage Russ Bitsy Beau Cat Lady Mug with Plate 5511 is a charming collectible piece featuring a white kitten in a 3D shape. Made of ceramic and porcelain, this original Russ brand mug is suitable for hot or cold beverages. The mug is an all-occasion item with a theme centered around animals and dinosaurs, making it a unique and adorable addition to any kitchen or home decor collection. Made in Japan, this vintage mug with plate set is perfect for cat lovers and collectors alike.