Without a doubt this is one of my all time favorite alarms! Sporty, great wrist presence, complicated, beautiful and useful! Here it is the NOS, black coated, 1971 Citizen Alarm Date Custom V2 blackie! (model 4-310179Y)
I wrote a few articles about Citizen alarms powered by this movement so the data is the same: a hand wound movement, calibre 3102 (date), 21 Jewels, 18,000 bph. The twin crowns are for time setting and winding the main spring and the other one for setting and winding the alarm. The crown at 2 o’clock in first position is winding the alarm while the alarm is deactivated. If you pull it in the second position you can set the alarm (counterclockwise) and the alarm is activated. Pressing it while the alarm is ringing will stop it. The crown at 4 will wind the watch and pulling it out will set the time. The alarm will ring for about 13-16 seconds.
The case is black coated and so is the bracelet. Read about another beautiful blackie V2 HERE. The three crowns, the bezel and the case back are made of stainless steel and are polished.
The dial is gorgeous, black, with applied luminous hour markers that are still glowing today. The date is located at 3 o clock, in a white frame, and is printed in white on a black date wheel. The second hand is orange and we have one more color, yellow, used for the inner bi directional rotating bezel. This bezel is operated by the third crown, the one located at 10 o’clock. You can use this feature for easily reading the elapsed time, up to 60 minutes, just as you do with your usual diver.
Read more about other alarms on the dedicated page HERE.