Seth Thomas Ship’s external bell

A ship’s bell clock rings the same pattern every 4 hours. Starting at:

• 12:30 – 1 bell
• 1:00 – 2 bells
• 1:30 – 3 bells
• 2:00 – 4 bells
• 2:30 – 5 bells
• 3:00 – 6 bells
• 3:30 – 7 bells
• 4:00 – 8 bells

The pattern starts over at 4:30 where it rings 1 bell. Every 4 hours correlates to the 6 watches during the day. It was used by early ships.