Birkenstock special edition sandals

Purchased in 2020, these were part of a special release.. cant quite remember what they’re called but they are very well made.. a bit heavier than your usual Birks with beautiful black leather. Purchased new they were about $500. Have some wear but when worn its not very noticeable because they are a deep black. Havent tried cleaning them but I will give them a wipedown with some leather cleaner upon purchase Size 37=US 6.5