I love this watch and am looking at buying it. Is there a big difference between the 2813 and the 2836 beat rate? The 2813 to me doesn't look smooth I have a video of it on a wrist but I've not seen the 2836 in action to compare.
The 2813 is a 21600bph movement. The 2836 is 28800bph. That is why the 2836 moves smoother.
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I can't see the pics of the watch. With the 2813 it's a bit of a gamble. Mine arrived DOA but it is easily replacable. Doesn't the Calibre 5 have an open case back though?