Circle in hour hand? Omega manual wind

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Hey crew !

My question for the day,

I have been coming across so much stuff lately its fantastic, have not been bored in days.

Came across this old manual wind Omega that a friend has, it has an odd circle in the middle of the hour hand.
Anyone seen this before?
The dial is quite neat as well.
Think its original? i cant seem to find anything similar, i would love to see something similar.

The number on the inside of the caseback is: 10065654 ?
Serial on the movement is 9245162

(Sorry, i am the worst for poor photos).

 
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It is a known design...
 
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199
It is a known design...

Shows how much im still learning,
whats it called, if i know some kind of reference to search im sure ill find the relevant info
 
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Edited, i thought it was a 30t2 SC ?

Yes, it would be, at least the versions I've seen...