Reference 150.501 Monza has black PVD coated case

Reference 150.511 Monza has a chrome plated case.

The Modena was the predecessor of the Monza and and is identical to the Monza, other than the name on the dial; has the same reference number on the case back (150.501). The Modena series was sold in the German market in very limited amounts.

The Modena was the predecessor of the Monza and and is identical to the Monza, other than the name on the dial; has the same reference number on the case back (150.511). The Modena series was sold in the German market in very limited amounts.