Here is an example of a vast Scottish Resource. Access is through the public library or a Scottish school or a subscription can be bought.
Scran Photo, Sound and Information Archive
Example search -Knitting wiskar,wisker or whisker
Scran link to information and photo of a knitting wisker. You need to be in a Scottish School or library to use this link
or access Scran through your Moray library card here and search for knitting wisker or fisherwoman’s knitting belt. Scran is an excellent resource full of photographs and videos on a wide range of topics.