Mechanical Alarm Wristwatch
From Chinese Watch Industry Wiki
Mechanical Alarm Wristwatches
Currently there is only one wristwatch alarm movement in production in China. It is the Sea-Gull ST28 which is hand-winding only, with hand-winding alarm function. The design generally follows the AS1475, like the Poljot and Citizen alarms, but extensively reworked.
Sea-Gull do not sell any own-branded watches with the ST28, but produce the movement for other watch producers. It can be found in Trias and Sorna branded watches and a few others. It is not widely used.