arcturus;
...sorry to hear...!
It is extremely rare to have an Ign Coil itself simply fail(!), although I suppose it could happen...loss of spark is more likely a
result, caused by some silly little thing like a fatigued Points Wire falling off, or the Distributor Through-Bolt loosening and shorting to the Dist case, causing loss of Points Opening function.
See:
http://www.sw-em.com/Volvo%20Ignitio...ition%20System
BTW...I'd rather perform some instant troubleshooting and repairs, on the side of the road using my Swiss army knife, and possibly sacrifice a "Sunday Shirt", than to suffer the indignity of allowing my neighbors to see a car of mine coming home on a flat-bed...but that's just me...
Good Hunting!