Now, this is a watch you can’t miss from across a room. The combination of the quintessential Panerai cushion shape with crown guard and spartan, luminous dial is unmistakable. As a classic of the aughts, this Luminor Marina model (meaning it has a small seconds) runs on an ETA Unitas base, which Panerai called the OPXI. Though Panerai has since gone fully in-house with its movement production, the Unitas caliber is an essential part of the brand’s history and many collectible PAMs used it, likely because of its relative simplicity and reliability, as well as its glancing resemblance to the Rolex manual wind calibers that graced the earliest Panera models.