Citizen 2502 Instruction Manual page 9

Elapsed time: shows that
10 minutes have passed
since 9:10
The register ring can be used for various other activities besides diving, for
example parking, walking, and keeping track of the remaining time before
departing or before meeting a friend, or however you like.
Elapsed time
Remaining time: shows
that 20 minutes remain
until 9:25
Remaining time
7