Symbol 3443 from ISO 7000 - Title/Meaning: Differential gear oil Function/description: To identify differential gear oil. To identify the fill point for differential gear oil.
pay attention to orientation of symbolAdditional information: 
This symbol may be used to indicate differential gear oil level.
Own work using: iso.org/obp/graphics/grs/5908a535-5bd4-48f0-b9fb-b3712193bddd 200.png
Vectorization:  Mrmw