If actual ivory with visible grain, and not some composition scales, annointing heavily with pure mineral oil can prevent it from drying and cracking, the same goes for stag. I am no antique pocket knife authority at all, but the flake look of scales in photo suggests to me more a celluloid material, bolsters and pins appear as an inexpensive knife from between the wars, and most reputable brand knives were proud enough to put maker on blade past inexpensive promo items...but, for all I know, that a rare one from the 1800s for all I can see of it...still, neat and old, whatever it is.
As for a more modern version of a cheap promo knife, I'd sent this to another poster with the caption, "Hurry down to your local Ford dealer today to test drive the all new 1963 Thunderbird, and receive a free knife!"
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It passed the red hot needle test with flying colors. I own many ivory and bone knives.
Here is a old Bone handle Barlow.
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