The Omega Speedmaster Day-Date (aka Triple Date) was introduced in 1993 and this unpolished example is one of the early 3521.30 models. It’s perfect for the Speedy enthusiast looking for something different along with a few extra complications.
It is powered by the original Omega caliber 1150. In addition to the standard chronograph function, you’ll also get the a 24 hour indicator at 9:00, a date indicator circling the perimeter of the dial, as well as the day and month at 12:00.
In 1999, Omega updated the Day-Date Speedy with a bump in reference number to 3523.30 and caliber number to 1151. With even more upgrades in 2007, the Day-Date Chronograph became the 3221.90 with a chronometer rated 3606 movement and 40mm case diameter.