Cartier

One of the nice details and hallmarks of Cartier design language which I have always found attractive. Not a real sapphire on steel models but I don't care! ...  

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This is an important part of the Cartier design, instantly recognisable from under a cuff.

Great design feature...classy yet subdued

With its manual wind movement 430 MC / Piaget that you can find in its most precious Tank or Santos Dumont models! ...  

Thank you for your comment, looks like cordovan straps on both of your watches? I like cordovan too and have been debating what strap I may get in addition of the blue one (nothing wrong with it, just for fun and to dress it down a bit).