'66 Strat fretting question....

[Mike Kolb]

G'morning  ... A good friend gave me his 1966 Strat to refret and I'm looking forward to it.  Before starting, I researched whether or not this particular guitar was fretted "sideways" at the factory as so many were. Found a lot of generalities but nothing terribly specific. 

So the question might be... is there any visual indication to look-for that would indicate a sideways fret job?  I know there's some strat geniuses here.....:)

[Mark Pollock]

Okay, how the heck did they mill those fretboards and install them? It would seem that they would make a flat fretboard, soften and bend it, and then install it. Anybody know?