@Nobel Prize - the 2nd one is not the blue dialed version, seller states in the description that it's black. The AR coating and angle of photographing it makes it look blue, I've seen it in a few different watches. I'm fairly certain normal versions of the chronograph were sold with either buckle or deployant clasp.
@krisztian_andre - the first example is different from the rest of the chronographs, as it has the rattrapante version of the movement. It's more expensive but adds a degree of exclusiveness; however, for a non-watch nerd, it will make little to no difference.
I'd definitely go with the modern Portugueser chronographs, vintage pieces are trickier to purchase via eBay. As you're probably based in Germany, you have a good selection of on-line dealers to choose from.
The watch is amazing in person, I've chosen it to mark a special event and don't have a shred of regret (the solid steel caseback makes it very good for engraving, too)!
Here's mine!
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