Hi Rasmussen,
The Dual plate as far as I know was slated for the G-10 only. It is not common to find a G-14 2nd plate, however as you pointed out you have found some photos of this 2nd plate. The LATE G-14 was made at the same time as the G-10, I suspect the G-14's that did have them, mearly had them to match the new standards of the G-10. Meaning it was not a standard implimentation as it was on most G-10's.
There are only 2 or 3 photos of "Rita", and the G-14 is not my main knowledge.
I know there was a debate about the W.Nr., loss date, etc...however it is going way off topic to the original posting and I want to stay away from the G-14 in this thread.
