This is a Speedmaster Professional with a see-through back and a leather strap. I am selling it to organize my collection. Please comment if you have any requests, such as for additional photos. Brand: Omega Model Number: 310.32.42.50.01.002 Caliber: 3861 Power Reserve: 50 hours Crystal: Domed scratch-resistant sapphire crystal with anti-reflective treatment on the inside Purchase Date: September 24, 2024 Condition: There is a small dent on the outer edge of the tachymeter scale at 170. Otherwise, there are no scratches or dents visible to the naked eye. The leather strap shows signs of wear, but I mainly used a stainless steel bracelet, so I think it's within the range of normal use. Complete with accessories Warranty: Omega's 5-year international warranty applies even to parallel imports. Please see the Omega official website for details. Price Reduction: Please understand that I cannot lower the price because after deducting Mercari's commission, there would be no difference from the price offered by a buyer. OMEGA Speedmaster Professional Chronograph, 3861, See-through back, Hand-wound