Kind of funny,
back about 30 years ago my aunt steered her car into a garage to have the attendant check why the engine was overheating and creating white steam.
We kids were waiting with the aunt when the shop jockey came into the waiting area with a yello 5" toothpick knife. He said "here's your knife and your trouble!" Somebody stuck it in the radiator hose probably a long time before, and it never caused any trouble until the hose started to deteriorate.
It seems like alot of the actors of the silver screen were using daddy barlows alot more than toothpicks for "over-haul pocket carry" and hobo beat around knives. At 1 time in the earlier 20th century, a Strawberry Robeson daddy barlow or Case knife in same pattern would probably be more common than others, or maybe a harness type.
Maybe knife patterns were regional, since in Montana where I grew up, all the oldsters I ever knew carried stockmans or 2 blade Texas type jacks.
I never saw any quality toothpicks though until I moved to Va. The only toothpicks I ever saw while growing up were cheapo types in fish boxes or tool boxes half rusted out. Interesting thread.
Best-MC