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. The inscription is impossible to photograph, I have tried all possible angles.
Interestingly the same screws are used to hold the back in place and and for the metal back plate of the watch caliber.