Probably doesn't help you any further, but I bought the Haslite/Nylon-Strap version of calibre 3861.
I could not find it for trying/seeing it in real-life in the local boutique or a jeweler before buying it online, so it was a bit of a risk.
However I am really satisfied with the Nylon. It has a nicely done metal clasp mechanism and is black leather on the inside.
Feels great and is quite lean overall. The nylon gives a sporty, modest appearance and is in my personal opinion a perfect match to the black dial and outer ring. However, it would be a strap that more fits use in the space overall
It is definetly under-rated in my opinion. But styles and tastes are of course quite different.
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