This is a Speedmaster Professional with a see-through case back and a leather strap. I am selling it to organize my collection. Please comment if you would like me to add more photos. Brand: Omega Model Number: 310.32.42.50.01.002 Caliber: 3861 Power Reserve: 50 hours Crystal: Domed 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 offer a price reduction because after deducting Mercari's commission, the price would be the same as that of a used watch dealer. OMEGA Speedmaster Professional Chronograph, 3861, See-through case back, Manual winding