The one you have is the third model to carry the name, but the first major redesign. It is an '80s camera through and through, and is a *totally* different camera, sans the lens mount. It does not take the same bottom plates, motor drives, prisms, etc., and looks nothing like the older ones from an aesthetic design POV.
They are all great cameras, and all take the same lenses. Just be careful when purchasing accessories to make sure you get the ones for the '80s version.
I have one each of the F-1 model 1 and F-1 model 2. I do not have the one you have. I know this is not the question, but if anyone is interested, here are the differences I have noticed between model 1 and model 2:
1. The EI can be set from 25 to 2000 in third stops on model one, and from 25 to 3200 in third stops on model 2. I prefer the model 2 for this feature. (Same difference between FTb models 1 and 2.)
2. The advance lever is all metal and has a lower profile and a longer throw on model 1, while it is plastic tipped, higher in profile, has a shorter throw, and there is a larger angle when in the ready position on model 2. I prefer the model 2 for this feature; mainly for the ready position and shorter stroke. This lets my hook my thumb around the advance lever, allows me to advance more positively and quickly, and without having to shift my whole hand as much. (Same difference between FTb models 1 and 2.)
3. The battery check feature is combined with the meter on/off switch on both models. However, the battery check position is momentary on model 2, while it clicks into position on model 1. I prefer model 1 in this case.
4. The shutter release collar is more "collar like" on model 2. It is taller, wider, and has a flare on top and a recessed "cup" shape, while model 1's collar is simply a low profile, straight tube in which the shutter release sits. I prefer model 2 in this case. I can easily rest my finger on the collar and shoot by making a slight shift in my finger. On model 1, you have to be a bit more careful not to trip the shutter if you are resting your finger up there. Perhaps there was no difference between the two models in this regard, and there were simply different collars available for the system. (FTb model 2 may have this same feature, though I don't know, as both of my FTbs are the older models.)
5. There is an area to slip a film box top on model 2, but not on model 1. I prefer to have the ability to do this (minus Scotch tape) when I am shooting multiple bodies with different films, Like on my recent cross-country trip, on which I brought all five of my FD bodies plus a Nikon F. (FTb model 2 may be the same.)
(FTb model 2 uses the same style DOF preview/self timer/mirror lockup/manual aperture control assembly that was used on F-1 models 1 and 2. It is operationally the same, but cosmetically different than the one on FTb model 1.)
None of these differences are a big deal, and they would not keep me from purchasing or using one camera over the other.
I would purchase an old F-1 over a new F-1 simply because all of my accessories are for the older ones. My Speed Finder, MF drive, F drive, and my lovely Type F focusing screen would not work with the new one!
Canon lists them like so in their online "Camera Museum" (http://www.canon.com/camera-museum/):
1st model (1971): "F-1"
2nd model (1976 with minor changes): "F-1 (Later model)"
3rd model (1981 - your model): "New F-1"
KEH lists the cameras as follows:
1st model: "F-1"
2nd model: "F-1 2ND STYLE"
3rd model: "F-1N LATEST"
A lot of people call them F-1, F-1n, and F-1N, respectively.