That looks like my old OMER Professional 5mm. It's made of the older stiff rubber, not Yamamoto 45 or equivalent. It was nylon one side and smooth rubber outer. I sold it to a friend and he wears the smoothskin on the inside for better sealing. In your waters you could wear the nylon inside without getting cold I'm sure.
It was a good suit for the price, no complaints.
Cheers,
Erik Y.
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