Wedgwood England Jasperware Square Trinket Dish

Pretty blue and white matte finish vintage Jasperware trinket box in square shape from Wedgwood England Neoclassical design on the outside and top with seated goddess holding a bird cage and others surrounding her. Winged putti and angels are along the bottom. From an estate collection - there is some rust(?) staining on the inside of the box, otherwise no other damage Marked Wedgwood 18B? on the bottom with initials TC? difficult to make out Please photos for close ups of the box including the stain to determine your comfort level with this flaw