Vintage Oris Star

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I've just recently had this serviced so I'm wearing it a bit more.I'm struggling to find any information about it. I have never found another one like it.is there a catalogue online somewhere?
 
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The answers you are seeking from us might be best answered by whoever serviced it. Can you show us the mechanism?
 
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Thank you. I'm still struggling to see where my variant fits into the range. It's closest in the dial too 3663/9. Straight date window and similar hour marks. However, that is a 725 and 17 jewel. The 25 jewel models are different and strangely have a lower model number). Mine seem to fit somewhere in-between
 
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Thank you that lulls one of my fears. It would still be nice to find the model number