Home High Security and Challenge Locks (1152) Bjarne’s “Denmarkian Gravity” Lock

(1152) Bjarne’s “Denmarkian Gravity” Lock


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My vises are made by Panavise, a U.S. Company.  The one with the wide jaws is the model 350.  The smaller one is the model 301. Both have the 312 Base mount – www.panavise.com




  1. Shall we say… “whimsical”? Whimsical pinning. So much easier on the ears than “careless”.
    If Denmarkian gravity isn’t a thing, it should be.

    Consulting with authorities, I’ve determined that “Denmarkian” is to “Denmark” the way that “Norwegian” is to “Norwegia”.

  2. Unfamiliar with the design boundaries of what constitutes a challenge lock. Does a missing pin or spring disqualify a lock? Regardless, it doesn’t seem to thwart our friend Mr. Johnson. Nice pick and interesting pre-pick call on lock guts.

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