Originally Posted by Dralowid
If the flash plug is on the back next to the finder window and the speed dial looks like a IIIf dial with the flash value numbers around the outside then it is most likely to be a factory conversion.
It is better to have a conversion - preferable a III - without the flash synch: 1. it looks better 2. the synch can (and will) cause problems with the high speeds (uneven exposure).
It is better to avoid the conversions altogether. The originals look much better and are very reliable cameras, above all the III.