Good observations, Brian.
I figured it was likely not British given the metric scale, but who knows?!
I'd be delighted if it turned out to be Swedish, but "antikt måttband läder krona" turns up nothing on Swedish eBay nor Google. "Vintage leather tape measure" gives me 28 results on eBay Global, but none that match or feature a crown...
Might take a while for this, but it only requires the right person browse in here!