Here's a little silver to blue comparison for you, in case they didn't have the silver in stock.
I absolutely loved the blue dial, but for me it always was the pink gold, silver dial and blue hands when it comes to the 1815.
Not that I can't see myself wearing the blue, but more importantly: I don't see myself ever replacing the silver, whereas I might find other blue dialed watches I'd like in the future, or simply more likely to get tired of it at some point.
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