Purchased from an authorized retailer in the 2010s. The warranty card has been lost. The initials engraved on the item may serve as proof of purchase from an authorized retailer. [Important Notes] There are scratches, stains, blackening, and corresponding signs of aging. Please refrain from purchasing if you are looking for a quality condition similar to new. Please purchase only if you understand and accept the condition. [Size] Please note that there may be slight variations due to amateur measurements. Approximately 10.5 cm (height) x 6 cm (width) when closed.