Date of manufacture and location
identification mark certificate by doctor
Identification marks or health marks on live shellfish must be kept until the shellfish are shucked or processed. The marks help trace the shellfish back to their source in case of any health or safety concerns.
30 days
Casting marks on the bottom of an old National Pressure Cooker typically indicate the model number, manufacturing date, and sometimes the capacity of the cooker. These marks are often found as embossed or stamped numbers and letters, providing essential information for identification and compatibility with replacement parts. They can also reflect the quality and authenticity of the product, as well as its historical significance in cooking technology. Collectors and users often reference these marks for maintenance and restoration purposes.
Bunter marks are the marks produced by a bunter, or head-stamping, tool when the bullet is manufactured. This tool imprints the manufacturer's name and bullet's calibre on the cartridge casing. It is possible to match bunter marks and determine which bunter made them.
Between 30n and 45n.
the Kamakura bakufu
The maker's mark.
the marks have to be pointing each other in the center of the gears
It means that the cartridge is not recommended for use in the maker's printer. Or it won't physically fit inside the printer. Or it has been refilled, but the chip inside some cartridges won't recognize the refilled cartridge and marks it as empty.
The North and South Poles.
There shouldn't be any official proof marks if it was manufactured in the US. Any marks would be manufacturer's inspection or identification marks and most of these mean nothing after the gun leaves the factory.