I know very well the old danger and warning signs used on propeller aircraft. ISO signs are not only for lasers, but for any hazard and it is the new global standard for such decals. The new signs are something which have suddenly appeared on P-3 propellers, even here in Norway on the C/N fleet.
Just look at the pics, the black and yellow triangle perfectly follow the ISO standard with a stylized 3 bladed propeller as the danger symbol followd by the warning text bellow. The triangle is pointed in the direction the propeller is turning.
On the normal/ older P-3 blades it was common to see the badge of the manufacturer, but not anymore.
I know of norwegian military equipment which have been grounded because the dangerous/ optical sights with lasers part did not have the new ISO...