From the manufacturer
Ironman Classic 100
The Timex Ironman Classic 100 features a large display and fast 5-button access to 100-lap stopwatch memory, customizable alarm and interval/countdown timers. Water-resistant to 100 meters with Timex Indiglo backlight.
Ironman Classic 50
The Timex Ironman Classic 50 was built as a lightweight sports watch and is sealed for water-resistance. Features include a stopwatch with a 50-lap memory, customizable alarm, countdown timer and Indiglo back-light. Water-resistant up to 100 meters.
Ironman Classic 30
The Timex Ironman Classic 30 comes in a variety of fun colors and patterns with both full and mid-size case options. Features include a stopwatch with a 30-lap memory, customizable alarm, countdown timer and Indiglo back-light. Water-resistant up to 100 meters.
|Ironman Classic 100||Ironman Classic 50||Ironman Classic 30|
|Occasion reminders with 15 occasions||–||✓|
|Lap memory recall||100||50||30|
|100-hour chronograph with 99-lap counter||✓||✓||✓|
|Recall of laps & total time (latest workout in chrono)||✓||✓||✓|
|Recall by date with summary of best lap and average lap (multiple workouts saved in chrono)||✓||✓||–|
|24-hour countdown timer with ability to repeat up to 99 times||✓||✓||✓|
|Interval workout sessions||1||1||–|
|Number of interval timers per session||9||2||–|
|Customizable alarms with daily, weekday, weekend and weekly options with 5-minute back-up||5||3||3|