Husky's UK website - IPL's and manuals
Husky's UK website now contains a lot of IPL's for older models. As far as I have observed, the library goes at least back to the CD and S models from the early 1970'ies. For many models ther are a whole series of IPL's, so you probably can find out which changes were made trough the production.
http://www.husqvarna.co.uk/
You just have to open the site start/main/home page, and scroll down a bit until you see mention of IPL's.
Click on the link there, and you will be able to search for both IPL's and user manuals.
There is no table of contents, but if you enter "chain saw" in the search window, you can see what is there.
I think that there is several hundred IPL's there, maybe all IPL's from about 1971 until now.
There is a lot of user manuals also, but not nearly as many. They don't go as far back in time either.
Edit january 2006;
The IPLs and manuals are now availiable on Huskys websites in several countries, not only in the UK.