Sinn Frankfurt Financial District watches

The Sinn Frankfurt Financial District watches are Sinn's line for people who work in finance, named after the brand's home city, the financial capital of Germany. Helmut Sinn, a flight instructor and Luftwaffe pilot, founded the company in Frankfurt am Main in 1961. Most Frankfurt Financial District watches show a second or even a third time zone, and Sinn marked the line's 20th anniversary in 2019.

The 6000 belongs to the original Frankfurt line: a 38.5 mm steel chronograph with a black dial that tracks up to three time zones. The 6000.04 is the same watch in rose gold. A white-gold Frankfurt Financial District watch took first place at the Goldene Unruh awards in 2006, and a platinum one in 2012. The 6060 and 6068 share the 6000's 38.5 mm steel case and black dial.

The 6052 trades the extra time zones for a calendar with a week display. Its Sinn calibre SZ03, based on the ETA/Valjoux 7751, gives the chronograph a 60-minute counter instead of the usual 30 minutes. That counter sits at 12 o'clock with two small windows for the day and month, a central hand points to the date and a small hand to the week number. Its sunburst dial moves it away from the tool-watch look of most Sinn models, and the rotor carries the Frankfurt skyline in gold engraving.

The 6099 is the larger watch, at 41.5 mm and 15 mm thick. Its anniversary edition, the 6099 B, is limited to 200 pieces and has an electroplated blue sunburst dial. Like the 6000, it is a chronograph that tracks up to three time zones, here with a 12-hour rotating bezel and a 24-hour hand. Inside is a Sinn construction based on the SW 500 with a skyline-engraved winding rotor. It has a D3 screw-down crown and takes a 22 mm strap.