does anybody have any idea what make/series these 15pF caps are?

i bought these from a local supplier from the whatever bin. i'm pretty sure they will work for what i need but i would be curious to know what make/series they are so i can see what dielectric is used. they look like they could be TDK but i have no idea.

if you have any info, no matter how small, it would be appreciated.

The are more than likely to be X7R monolithics, made by a large number of different manufacturers in China, so hard to tell where they came from in respect to an actual brand name.