I need help with a vintage trick knife

[not2sharp]

Senility is setting in.

I found this vintage knife in my collection and can't remember how to close it. It is an old Japanese made Frost cutlery lock back folder with a hidden lock release. Any ideas?

n2s

 

[gazz98]

Are you sure it isn't a slipjoint?





(Sorry, I couldn't help myself. I'll show myself out ... )

 

[cbach8tw]

Does one of the bolsters slides to the side or are me of the slabs move? Just a thought.

 

[not2sharp]

Are you sure it isn't a slipjoint?





(Sorry, I couldn't help myself. I'll show myself out ... )

Definitely a lock back with a nice vault like lock-up and zero blade play. IIRC the front bolster releases the blade, and I believe it would be the pile side bolster. But neither side wants to move for me.

n2s

 

[Getting older]

Maybe the blade pulls out?,Just a thought

 

[KenHash]

Looks like a typical bolster lock, but maybe just stiff?

 

[Hackenslash]

Could it be a matter of moving both bolsters against each other, kinda like the old CRKT Fulcrum?

 

[gazz98]

Have you tried pulling out the back end (ie. where the lanyard hole would be) straight back?

Are you sure it isn't a fixed blade knife?

(Again, sorry. I'll have my wife slap me upside my skull.)

 

[not2sharp]

It was a folding knife, but if I can't figure this out, I may as well call it a fixed blade and get a sheath. :}


n2s

 

[Danke42]

Maybe the blade pulls out?,Just a thought

That would be my bet too.

If it is stiff try hooking that big square notch on something and pulling back on the handle.

 

[midnight flyer]

You might want to try soaking it and some kind of penetrating oil or solution. A few years ago I came on too an old knife collection and there was just enough corrosion from the different metals of the bolster to steel connect that a few of the older folders were frozen shut. Almost felt welded.

Cleaned them out with brake cleaner, put the bolster/pivot/blade end into some penetrating oil for a couple of weeks and they were stiff, but opened. Easy to work on the moving parts after that.

Robert

 

[not2sharp]

Found it!!!!

The trick is to push upwards (towards the blade spine) on the front bottom corner of the pile side bolster. It was a little stiff but it finally released.

Thanks for the help.

N2s