Ceramic Scale Ring Chronograph Ring Declaration: all manual measurement will have error. Size is for reference only, prevail in kind 12 o'clock position beads (green luminescent) Installation method: watch repair store Professional master installation installation method: circle mouth - special double-sided tape stickers - glue - paste on the Ceramic ring: outer diameter of about 38mm - inner diameter of about 30.7mm - thick 1.6mm
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