Omega big&old

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Bumper from late 40’s early 50’s? It has the same layout as my 1944 model. My Calibre is 28.10A with a 163.617 reference. Can’t see the size. If this is indeed as large as suggested above it is a completely different thing. Searching in that area should give you some answers.
 
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I believe it's the same watch you've posted in October '18 and '19.
📖

Or as someone wrote when last posted, a beast in the best sense.