I'm trying to identify these two fuzes. Unfortunately the period references (VN era) are not that accurate, and are often contradictory. I've been going through the old FOMCATS, DIA ref documents, etc. with no luck. It doesn't help that per US manuals there are several fuzes designs that only differ internally, so you only have the markings to go on. And my markings don't match my documents. I'm hoping that someone with a better library - or a Chinese national - may be able to assist?