Here's d comparison again Crown Guards between 1665 SD vs. 551X/1680 SUB..++

Err...looking at BASELINE profile of the Crown Guards...from behind...
of this Original Ref 1665 SD...

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Here's looking at BASELINE profile of the Crown Guards...from behind...
of this Original Ref 5513 SUB...


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Here's looking at BASELINE profile of the Crown Guards...from behind...
of this Original Ref 1680 SUB...


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On the BASELINE of the Crown Guards of 551X n 1680 SUB watch cases...
You will find "[" n "]"...from behind...


The FAKEEEE watch cases...do NOT have this "[" shape...
at the BASELINE profile of its Crown Guards...


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FAKEEEE "1680" watch case...


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Best regards
Orchi.