Estwing literally has a bunch of hammer designs made for export, that are barely available in the USA.
This includes British Claw Hammer designs, and German style Blacksmithing and roofing hammers.
www.estwing.com
These designs are not readily available in the USA.
This is ebay UK.
There are everything from new Estwing hammers in the latest designs, to well used ones.
Axminster tools, a UK tool seller.
Under claw hammers, the only hammers listed are Estwing.
Dual purpose hammers for striking nails and extracting them
www.axminstertools.com
Another UK tool retailer.
www.toolstop.co.uk
An Australian tool retailer
Buy Tools For Sale Online or In-store at Tools Warehouse, Australia’s Leading Independent Tool Shop ✅ Afterpay Available!
toolswarehouse.com.au
Another
sydneytools.com.au
Amazon Germany
Incidentally,
Marshalltown and W Rose trowels seem to be somewhat commonly used by British bricklayers, although I’m not sure about other countries.
The reason Picard, the German hammer manufacturer, is now making a solid forged hammer, is likely to compete with Estwing.
The same goes for one or more Japanese hammer manufacturers that are now making a single piece forged claw hammer.
It’s not like the classic Estwing hammer designs were still under patent protection.
Those patents likely expired decades ago.