Volvo Repair: broken 850R timing belt under 9000 miles, paint chips, timing belts

Question
Good morning,
My wife and I just inherited her late father's '96 850R (854T) sedan.  It's a sweet car and we really are hoping to be able to keep it.  He was a car fanatic.  The car has 210k miles on it, but the interior looks factory new, and the exterior has paint chips below the bumpers only.  The main problem is that the car sat undriven/unstarted for about 19 months.  We've replaced the starter and the ac compressor (which shredded the serpentine belt when it froze up) and are now at about $1400 in repairs.  

As our mechanic tried to start the car after the ac repair he couldn't get it to turn over and he found that the timing belt had broken.  I have all the repair records from my father-in-law and he had the belt changed at 69.5K, 139.6K, and 200.8K.  The car now has 209K on it.  Our mechanic thinks that the broken belt is older than 9000 miles because of the condition of the belt rubber.  He's now testing compressions to see if any valves were bent.

My questions are:
1.  Is there any way to prove a belt is a certain age (lot#, serial #, etc.)?
2.  Would a timing belt be susceptible to breaking after sitting for 19 months?
3.  Do Volvo timing belts come with a warranty?
4.  I have the numbers printed on the broken belt.  They were worn but still readable.  Can you tell anything from the numbers if I give them to you?

Thanks for any help and advice you can give us.
Ian

Answer
timing belt was due to replace  at 70k first time 2nd at 140k 3rd time at 210k so you were very close to replace the belt plus your car was siting for long time  also fit the belt broke you will have bent valves the best way to go for you is go with used engine  to fix the old one is not worth it you will have problems than maybe  with lower part of engine no warranty on belts .