Looks like the red one is the start of DANGER. Probably from a fighter jet. The other one, no idea.
i believe you are spot on with that! Now to know what the correct numbers are!!The other seems to be the markings you would find on a shipping container or railroad tank car.
Just FYI I just received the microscale 87-2 decal sheet today and I can confirm it is wrong in both size (this is HO and this is way too big) and data (numbers).
I am not even sure microscale was around at this time and I found some other manufacturers that were at this time but to be honest I think it was from a kit and not from after market decals.
Some info on Microscale:
Microscale Industries Inc. is located in Costa Mesa, California, and was founded in 1933 by Martin G. Krasel. Microscale is known for producing quality decals that are easy to apply and result in realistic models. Scales HO, N, O, Z
Feature Products: Decals and decal finishing products
Specific Eras Steam-to-Diesel transition (1940-1960), Classic Diesel (1960-1980), Modern (1980-Present)
Price Range: $2.00-$20
Delivery Information: Because Microscale is a batch producer, some items may not be immediately available.