I think these knives were also used by physicians, druggists or pharmacists to compound ingredients and also to sort, count and dispense pills or tablets.
Obviously, if the handles advertise a paint or color company, they were palette knives, though.
Here is a German made pre-1900 Robeson three blade pearl handled knife with a flexible spatula master blade, a pen and cork screw.
Bernard Levine refers to this as a European Physician's Knife.
Photo should expand twice with left clicks.
DE OPPRESSO LIBER
"...Men may spurn our appeals, reject our message, oppose our arguments, despise our persons ___but they are helpless against our prayers. "