Searching for medium sized "survival" knife capable of chopping

[damib]

Except that isn't what you said...13 cm is only 5.1 inches. That extra inch makes a big difference.
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You haven't mentioned a budget, yet (that I saw); but if 6" is an option, get an Esee 6. At 5.25", the Ratmandu was already mentioned. If you want smaller, Carothers FK2. (Unfortunately, the RMD & FK2 are out of production; so you're stuck with the secondary market.)

Yes, I was sleepy when I wrote it.

I intentionally didn't say anything about budget because budget isn't a big concern. I'd it's a good knife, the I don't really care of it''s 20 bucks or 300 bucks. Although I surely don't think buying a 1000 dollar knife would be a good ideas for heavy use knife.