Keep the Submariner as I believe it is one the cornerstones of a serious collection. It does not matter if you have one watch or 20 the Rolex diver will typically be there. That does not mean that you should not pick up a Panerai and the 112 is a nice watch. Go find a Panerai like the 112, 111, 104, 005, 001 and add it in.
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