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These are basically 013s but with sapphire, applied indices, and a better movement (and this one is pepsi with a jubilee bracelet).
[https://longislandwatch.com/islander-38mm-automatic-dive-watch-isl-51/]
But that squale does look good!
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There are sellers on Etsy that make modded skxs with updated movement and crystal for under £250
I was looking at getting one from the link below, but never decided on options.
https://www.etsy.com/uk/listing/1115992577/vintage-watch-seiko-skx013-mod-divers?ref=share_v4_lx
Or you could pick up an 013 and mod it and save some money?