Please provide a clear picture of the marks and clarify which particular part you want identified.
Your camera is too close to the marks. Making the picture bigger is not helpful when the initial quality is no good. Take the picture from a bit farther back and take the time to make sure it is in focus. If you have one, a magnifying glass between lens and object often helps.
The mark is, of course, upside down in you picture. I suspect that the single large mark is a Convention mark but without a clear view of the smaller marks I can’t suggest an origin.