Certina Argonaut 280. Serviced and running beautifully. Gold plated body, correct crown and with the correct new (old stock) and unworn Certina branded strap with gold-plated and branded buckle/tang. Just serviced at Time Specialist in London.
Some light scuffs to the case and some patina to the dial, but looks great and very unusual to find with a strap like this.
