Yes. It seems to date a piece w/ this mark. Can't remember off the top of my head - or if that is the case. But, I do have a ring marked in this way that appears to be from the 40's.
This marking relates to some odd, and now obsolete, US laws. 14 karat means that an item is 14/24 gold with the remainder being other metals. The problem comes with the rounding. 13.88/24 would be rounded to 14k under the old US law and 13k under matching British law. Obviously, this could cause some confusion, especially for US manufacturers who want to sell in Europe. European customers simply didn’t believe the marks. They started using 14kp (the p stands for plumb) to mean that it is at least 14.00/24 parts gold. The rules have actually changed to where US manufacturers are using the same rules as the rest of the world but the 14kp system of naming still lives on. For new pieces, 14k and 14kp both mean that it’s at least 14.00/24 parts gold. In older pieces 14k might contain as little as 13.51/24.