The Story Behind SEIKO Credor 8420-5370 (SHA Case) Produced in the 1980s, this vintage Seiko Credor (Ref. 8420-5370) features a rare SHA (Super Hard Alloy) octagonal case. Engineered by Seiko to be highly scratch-resistant, the dark metallic lustre of the SHA case creates a stunning contrast with the gold-tone octagonal bezel and dial. Measuring an ultra-slim 4.5mm in thickness, it offers a sophisticated geometric aesthetic that remains remarkably durable over time. 1. Product Condition Please check the product images. [Operation] Works perfectly. [Accessories] Watch only [Other] - Please note that there may be some minor scratches as this is a used item. 2. Shipping The item will be shipped from Japan via tracked and insured international shipping (DHL / FedEx / EMS, etc.) within 1–3 business days after payment is confirmed. The tracking number will be provided after dispatch. The item will be carefully packed with protective materials and waterproof packaging. 3. Customs & Import Taxes This item is shipped as DDU (Delivered Duty Unpaid). Any customs duties, import taxes, VAT, and handling fees charged by your country are the buyer’s responsibility. These charges are not included in the item price or shipping cost. Please check your local customs regulations for details. 4. Returns Due to the nature of vintage and pre-owned items, returns are generally not accepted. However, if the item is significantly not as described or arrives damaged, we will handle the case in accordance with Catawiki’s policies. Please carefully review all photos and descriptions before placing your bid, as signs of age, wear, and minor imperfections are to be expected.