Cheap Chinese Bling

I replaced the battery in a customer’s watch - one of many that she owns, not one of which was working.  It’s a world-famous “Vivani” brand 😉 three-hander with a Chinese case and a claimed Japanese quartz movement (it did have a Japanese battery).  The battery was an SR626SW, which I replaced with an Eveready 377 (same size, way simpler numbering system).  The back of the case has a strange bumpy texture and I can’t imagine any reason for that, since nobody will see it under normal circumstances.  
 

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Size comparison with my 35.5 mm Seiko:

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It’s all about the bling, apparently, not that there’s anything wrong with that.

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