SCHNEIDER OPTIK KREUZNACH Lens Cap SN 223-23 Retro Vintage Size: Surface: Approximately 54mm Back (Inner Diameter): Approximately 50mm * These are approximate measurements, so please use them as a reference. There are some minor scratches here and there due to aging, but I don't think there are any major scratches. Please check the images to make your judgment, as this is a personal inspection. I would appreciate it if you could understand that this item has been stored by a private individual before purchasing.