Platycerium willinckii is from Java. Closely related to P. bifurcatum, it is distinctive. Fertile fronds grow upward, then are pulled down as the frond matures, often becoming quite long. Slower growing than most clumping staghorns. It may need more water, at least part of the year.
Fertile fronds are strap-like for most of their length, then divide. This feature can be seen clearly in the center photo. Width of the fronds can vary from broad to narrow.