bigtriangle68
·It might be an optical illusion, but that Omega crown looks like it **might** be shaped a little bit different than either the early production Niad or later screw down crowns intended for this model.
It might be a good idea to track down the part numbers for the correct Omega crowns and winding stem for this watch and do a visual comparison to see if a watchmaker installed an incorrect crown or stem at some point.
Even better -- if you have a pair of digital calipers, measure the dimensions of your crown and then compare those with the known dimensions of the correct factory crown/s for this model.
I think the original Niad crown had performance issues (it could allow water inside when the watch was immersed in shallow water), so the later screw down crown addressed this performance flaw and was part of an Omega service bulletin upgrade at some point.
You mentioned you want this watch to be water resistant again. If your existing crown is either an early Niad type or incorrect, have your watchmaker purchase a genuine Omega screw down crown intended for this model.
Keep in mind some collectors prefer the earlier Niad crowns even though they had performance issues.
Some experts here can provide you the correct part numbers if you need them...
It might be a good idea to track down the part numbers for the correct Omega crowns and winding stem for this watch and do a visual comparison to see if a watchmaker installed an incorrect crown or stem at some point.
Even better -- if you have a pair of digital calipers, measure the dimensions of your crown and then compare those with the known dimensions of the correct factory crown/s for this model.
I think the original Niad crown had performance issues (it could allow water inside when the watch was immersed in shallow water), so the later screw down crown addressed this performance flaw and was part of an Omega service bulletin upgrade at some point.
You mentioned you want this watch to be water resistant again. If your existing crown is either an early Niad type or incorrect, have your watchmaker purchase a genuine Omega screw down crown intended for this model.
Keep in mind some collectors prefer the earlier Niad crowns even though they had performance issues.
Some experts here can provide you the correct part numbers if you need them...
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