Is it a Canon F1 or an F1n? it has features of F1 but ASA to 3200??

My F1 serial 600080 puts it squarely in the mid run of the F1n cameras according to the web. However it is lacking many of the features of the F1n...

It has ASA to 3200, and rubber strip on film advance lever.....

But it does not have:

No Shorter winding throw - it is still 180 degrees
no click-stop rewind knob
no threaded PC socket
No memo holder...

Just curious as to what you people think.it is..

If you don't get a definitive answer here, try APUG (apug.org, I think)...those guys know their film gear!