Are you sure that’s a “late production” version? Looking at it, it seems to be F-4E 68-0345, placing it as an F-4E-37-MC. That is a really early model, compared to the one I suggested, and if you notice it lacks the “doghouse” antenna on the spine that was fitted ~1977, and also lacks the TISEO.
From the DCS forums,
No F-4’s were actually produced from the factory with the one piece windscreen, as can be seen in the last McD produced F-4E (#5,057 which was a F-4E-67MC). You can see in this picture the standard framed multipiece windscreen. This F-4E went to Korea, btw.
The one piece windscreen was probably a one-off or limited modification done by the Missouri ANG, since they were close to the St. Louis plant where Phantoms were produced.
Here’s another one from arc forums.
It seems, to me, that it was a modernization test only applied to a few jets.
Although, for some reason, F4H-1 145310 had one during restoration work a few years back, although it looks like it was because the people who were restoring it simply couldn’t find an “original” windscreen. arcforums
But the F-4G at the NMUSAF has a one piece windscreen, which is odd.
