Strictly speaking, it is neither a nailhead, nor a birdseye, nor a tickweave, although it resembles all three, a little. Nailhead is more regular, the dots are more "rectangular" in shape, and they are arranged in a verticle/horizontal pattern (if that makes sense). In birdseye, the dots are round, and larger than those in a nailhead, and they are arranged diagonally. Tickweave is closer to nailhead, but much finer, almost imperceptible.
Now, that is the type of attention to details, that only this forum would appreciate.