Monster Polish Movie Leverlock?

[TwoFlowersLuggage]

Here's what I hope is an interesting question: Can anyone ID the monster leverlock knife in this movie?
https://www.youtube.com/watch?v=rBA3u-lXay8

The movie is Knife in the Water, a 1963 psychothriller from Roman Polanski that was filmed in Poland.

[Captain O]

That's a German Gravity Knife that slides out the front of the handle, not a lever lock.

I hope this helps.

[TwoFlowersLuggage]

Ahh - yes! That did help tremendously! It looks very similar to this:
https://www.youtube.com/watch?v=GosT33WDT74

[Captain O]

Ahh - yes! That did help tremendously! It looks very similar to this:
https://www.youtube.com/watch?v=GosT33WDT74

Very good, Grasshopper! (You catch on quickly)!

[TwoFlowersLuggage]

My google-fu is strong!

[Captain O]

My google-fu is strong!

We are silly, aren't we?

[ROGERGREEN]

It is very similar to a 1960's OTHELLO gravity knife, synthetic handles with the bail removed (9" OAL").