CRYSTRON LC ALARM released by Citizen in 1976.
Model number: 50-2014
When I was looking into various things to post this model, I found out that it was introduced previously. CRYSTRON_ALARMI noticed that the contents (modules) are exactly the same (9021)..
CRYSTRON_ALARMThe alarm sound was low, so I compared the sounds and found that this model had a much clearer sound.
The low alarm sound was not a characteristic of the model, but seemed to be simply a problem with the part that produced the sound, or the part that amplified the sound inside the body.

The contents are CRYSTRON_ALARM although it is the same, this model has a rounded design and a completely different impression.
Thanks to this, I didn't realize for a long time that the contents were the same.

The back cover is CRYSTRON_ALARM it's exactly the same, and although it looks like a screw back, it's actually a type that can be opened with a cozi opener.
There is another inner cover inside the back cover, and there is a gap between the outer cover and the inner cover to allow the alarm sound to be reflected and amplified inside the watch.

(Since the content is the same as last time and I ran out of ideas) I will introduce how to set an alarm.

This model cannot display a 24-hour system, so check the AM/PM of the alarm with the colon (:) between the hour and minute.
The photo above shows an example where the alarm is set for 7 a.m., but only the "top dot" of the colon is lit.
If it is afternoon, only the "bottom dot" will light up, allowing you to distinguish between AM and PM.

Also, you can tell whether the alarm is ON or OFF by checking the "○" in the seconds display.(The photo shows the alarm ON state)
You can see that the maximum functionality has been packed into the limited display area.