Symbol 2497 from ISO 7000 - Title/Meaning: Date of manufacture Function/description: To indicate the date on which a product was manufactured.
Additional information: 
The date can be a year, year and month, or year, month, day. The date shall be placed adjacent to the symbol. The date may for example be given as follows: 1996-06-12.
Own work using: iso.org/obp/graphics/grs/c454939d-d23f-40e6-a224-a2bc879f79a8 200.png
Vectorization:  Mrmw