Casio Melody Alarm M-1230 was released by Casio in 1981.
In the 1980s, Casio produced a number of "models with one special feature" that incorporated special and novel functions.
Is this model the world's first? Equipped with the melody alarm function of Phone dialer DBA-800 Along with others, I think this is a representative model equipped with special functions.

The breakdown of the 12 built-in songs is as follows:
・Theme for each day of the week from Sunday to Saturday: 7 songs
　　Sunday: “The Time of Music” (Schubert)
　　Monday: "American Patrol" (F.W. Meacham)
　　Tuesday: "Santa Lucia" (Neapolitan folk song)
　　Wednesday: “Romance of Love” (Spanish folk song)
　　Thursday: “Procession of the King” (French folk song)
　　Friday: "Kalinka" (Russian folk song)
　　Saturday: “Sakura Sakura” (Japanese folk song)
・Birthday alarm (Happy Birthday): 1 song
・Promise alarm (wedding march, toast song): 2 songs
・Christmas alarm (jingle bells): 1 song
・Time signal (noon) (Westminster chime): 1 song
　　*Westminster chime is the so-called "Japanese school chime sound"
It becomes.

Models equipped with the same module (module 82) as this model are also sold overseas, so none of the 12 songs installed are Japanese popular songs or J-pop songs.
Melody Alarm also comes in a variety of exterior variations, including this model (M-1230) with a triplet written on the upper right, as well as versions with different colors, resin body versions, and models with a large electric guitar written on the windshield (M-321, etc.).

The most distinctive feature of this model is that it has a "Christmas alarm mode" just for Christmas, which is on December 25th.
Only on December 25th, when the alarm is set, "Jingle Bells" will sound instead of the normal song.
Also, on December 25th, the "Xmas" display on the top left of the LCD will remain visible all day...

It is generally believed that the bubble era began around 1985, but listening to "Jingle Bells" makes you think of the good old days when society as a whole still had a lot of momentum.
(You can listen to it by pressing the bottom right button during Christmas mode even if it is not 12/25)

Oh, I forgot to mention that it also has a stopwatch function in 1/10 second increments.