I found this info on the Tar Paper source -
https://www.ebay.com/itm/192387401895?s ... 1438.l2649
or on their web page:
https://www.parts123.com/parts123/yb.dl ... 2~cadegfke
The fellow that found it got a photo of the actual paper:
The source info is from a volvo list:
https://groups.io/g/1800list/topic/unde ... 0,0&jump=1
Apparently they say it comes from the UK...
Tadek