<p>Apollo in the F's refers to the most updated F's, which included a plastic tipped winder knob, to "refresh' the F design to make it closer to the F2, so as to briefly keep it competitive during the transition. F prices have come down, but yes, there are indeed fake Apollos out there, and some see it as a way to fetch a premium over a more traditional F body.<br>
To the respondents here, I do not believe the OP was insinuating that F's were used on Apollo space missions. He was simply referring to the following, as noted on the excellent CameraQuest site: </p>
<p align="left"><strong> cosmetics changed late in production to match the then currently produced and just introduced F2. The F was updated with a plastic tipped F2 type advance lever and self timer, and stronger camera strap eyelets. The only Apollo variation that I know of is the PC connection. The earlier Apollos had the standard F flash connection. The later ones had the F2 type threaded PC connection. Shown is a black Apollo with the standard prism, F36 motor and cordless battery pack.</strong></p>
<p align="left"><strong>Though popularly called the "Apollo" due to the USA Apollo space program of the early 1970's, I have never seen any evidence to link this variation with the space program.</strong></p>
<p align="left"><strong>The earliest "Apollo" might be # 7256811 pictured in a Nikon instruction book. Nikon usually brought out a new instruction book with new changes. For some reason the change was actually made much later, probably about 7335000. That would make approximate "Apollo" production about 116,000 cameras--or at least that is my current best guess. </strong></p>