Seiko

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but that brown not my cup of ☕️ If these 2 then rather the blk

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that is if you can find one in 19mm Otherwise, a light grey/beige nubuck works - there are a few pics of this model on Instagram Not an easy model for straps... there is a Seiko bracelet that works very well with a vintage look

That will go very well

I would go with something like this ...  

I agree that the original green strap works better with this model but it is a bit too long for my wrist so that the watch cannot slide underneath my shirt sleeves!! So I decided to swap to my CF brown strap. Not perfect, but not too bad neither! ...  

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