Introduction for new visitors


Thank you for your purchase of this Citizen watch.

Main articles of web pages for “ Cal. No. YF30” are introduced here.

Read “Precautions”, “Maintenance” and other articles and use the watch appropriately.

Cal. No. YF30”

It is the home of explanation pages for this watch.
It is convenient for reference to bookmark this page on the web browser you use.


This article explains things to take care of for using this watch topic by topic.
Tips for long and comfortable use of this watch are gathered together here.
It is recommended to read through the article at least once.
Each topic is categorized under some titles such as “Before using this watch”.


This article explains remedies for troubles which occurs while using the watch.
If you have already known how to use this watch and have an actual trouble, it might be better to look at this article at first.

“After-sales service”

This article shows topics of methods of maintenance of this watch, warranty and supplies.

“ⓘ” “ⓘ Notice”

Notices about this watch from Citizen are posted here.