Chainsaws

I have a husqvarna Rancher 61 and I'm looking for the right owners/parts manuals.

Husqvarna phone support thinks it's from 1980 but not sure

Tag says:
Husgvarna AB Sweden
Practica 61 *** 823.78
1611 040340

All text is printed in black on the tag, except the last 6 digit number which is engraved, so I guess it's a serial number.

There seems to be multiple manuals for the same years between 78 and 85 so I'm not sure which is the right one.

I'll attach a couple of pictures

thanks for any help/pointers/links
alf