Pizza Co. (Thailand) Sweatband Watches

Pizza Co. (Thailand) Sweatband Watches
Caliber Swiss Ebauches, Battery R377 (marked Swiss Ebauches)

Box and Watches Front and Back Unlock Watch Watch Removed Open Case Movement Wrist Close

A nice gift idea from Pizza Co. (Thailand)
Much to my surprise, I found that the battery had the marking Swiss Ebauches R377 when I replaced it. I had a close look at the movement, yet could not find any markings. I just noted that the movement's top plate was fixed and can not be removed. It might be an ISA movement.
With a little tinkering (closing the gap between crown stem and case) the watches are quite fun to wear. But not for really sweaty activities I am afraid.