Horses of the world, 1934 version

It's interesting to see which breeds of horses were widely known in past times. Looking at show programs or books about horse breeds from past decades (or centuries) reveals which breeds were popular or recognized then, and it's often quite different from today.

The map pictured was issued in 1934.

The breeds described are (from bottom center, moving clockwise):

• Percheron
• Belgian
• Cleveland Bay (now rare)
• French Coach Horse (no longer in use)
• Kentucky Saddle Horse (now called the American Saddlebred Horse)
• Irish Hunter
• Thoroughbred
• The Godolphin Barb (an individual horse, not a breed; the Godolphin Barb and Darley Arabian are two of the founding stallions of the Thoroughbred breed)
• The Darley Arabian (see above)
• Prejwalski's Horse
• Connemara Pony
• Welsh Pony
• Celtic Pony (described as coming from the North of Ireland, Faroe Islands, Hebrides, and Iceland, and originating in the 10th century; today the term would refer to the old ancestral wild pony of northern Europe and the British Isles, not a specific modern breed)
• Shetland Pony (described as originating in Scotland in the 15th century)
• New Forest Pony
• Exmoor Pony
• Norwegian Dun (now called the Fjord)
• Mongolian Pony
• Polo Pony (described as 3/4 Thoroughbred, and up to 15 hh, found in England since 1872)
• Mustang
• Standardbred
• Morgan
• Orloff
• Hackney
• German Coach Horse (no longer in use)
• Shire
• Clydesdale
• Suffolk Punch (now rare)

The map skews towards the British Isles in the breeds represented, with a number of coach/driving breeds represented - perhaps more than would be if this map were done today.

If you were to make a world map highlighting just 28 horse breeds, which would you choose? Why?