A few weeks ago, I visited the Rijksmuseum in Amsterdam. I never dared to because of the crowds of tourists but with the corona virus situation it was pretty quiet. In it's collection, it had several Nimcha's which were owned by famous Dutch admirals.

For those who don't know what it is:
https://en.wikipedia.org/wiki/Nimcha

https://www.rijksmuseum.nl/nl/collectie/NG-NM-10412
https://www.rijksmuseum.nl/nl/collectie/NG-NM-6095

I think it's a really nice and practical design, probably that's why it was seemingly so popular among Dutch seafarers.

Now I was wondering, is there anyone who made a decent, working class reproduction of one?

That looks like a Polish sabre blade! It might be worth contacting this fellow if you want one:

https://www.facebook.com/tomek.kowmal