Why not try putting "vintage adjustable wrench" into ebay?

for example:

https://www.ebay.co.uk/itm/VINTAGE-9-Billing-Spencer-USA-ADJUSTABLE-
KEY-WRENCH/202105149114?hash=item2f0e67d6ba:g:BrYAAOSwo4pYOreI">https://www.ebay
.co.uk/itm/VINTAGE-9-Billing-Spencer-USA-ADJUSTABLE-KEY-
WRENCH/202105149114?hash=item2f0e67d6ba:g:BrYAAOSwo4pYOreI

best wishes,

Mike Lynd