MAYCO Quartz Alarm Chronograph, Hong Kong, late 1980ies
The back seems sterile
however if one holds it against a very bright light, one could see a very superficial laser etching. But one really only gets a hint of a back inscription and it is impossible to read. One only sees that an attempt had been made to mark the back with the features of the watch. You can also see that this watch's analog and digital circuit are powered by one battery only. Later, most analog and digital watches would feature a battery for each circuit. You can see two chips, one controlling the analog and one controlling the digital part. The big gold plated spring connects to the alarm membrane on the inside of the case back.
I must say that this caliber looks very nice - remember I paid only ca. USD 20 at the time - it seems to be very well made.