G'day Steve,

I think the various old patent adjustable spanners would all have been known locally by the best-known brand, back in the days before multinational tool companies and cheap international transport. "Footprint" was an English brand, but I can't remember, offhand, the city. I have seen their tools and they have a 'rebus' (an image of the brand name ... rebus is Latin, ablative plural of 'res' = 'thing') of the outline of a footprint.

The most common of this type of old adjustable spanner that I have seen in Australia is the German brand 'Dick'. This does nor have a rebus!

Regard(les)s,

Bob Bolton