GUCCI Men’s Horsebit Loafer Suede Tan Brown Size 43 1/2 (9.5)

Inside has questionable marks. I purchased at second hand clothing store and do not know what it is. I have tried to remove, but unable to clean it. The colour is red brown. Tried to capture in last two pictures. Most of the stitching on bottom of the soles have worn off. A classic suede loafer from Gucci with gold toned horsebit buckle. From smoke free home.