You can't just look at the pictures!
The text did describe the movement as "oval"...
;-)
Seriously, yes, the movement is "bespoke" and fit to the movement. Check out this pic -
Interesting point regarding immunity to scuffing and abrasions. The Millenary is really a very complex and beautiful work of metalworking, too quickly dismissed by most who look at it casually. It is worth a serious consideration.
Cheers,
TM