All About Pocket Knives

This knife belonged to my dad and I'm interested in knowing more about it. The tang stamp indicates from 1958-1960 but I'm not exactly sure. There is no model number or other identifiers on it. The knife is in pretty good shape with good snap on both blades. It does have some wear and scratches from being carried daily and sharpening but not too bad. There's a double rivet on one side where it appears the second rivet was installed when the front bone scale cracked possibly during production, Approximate value would be appreciated. I plan on passing it on to my son. Thank you for your help.

Approximate Value = PRICELESS! But you don’t need me to tell you that.

Extraordinary heirloom!

mrbailey,
to AAPK!
If your Dad's old Queen is 4.25" closed length, it is a pattern #52. It is also know as a Moose.
It has genuine, well worn Winterbottom bone handles and is a special prize since it was your fathers!
Some of the more knowledgeable knifers usually suggest comparing prices of similar knives sold on ebay to determine a value. But as it was already been stated, priceless would cover it if were my dad's knife.
Treefarmer