Who could build useful warships before World War II

Which countries could build useful warships in 1910 and 1935?

Most countries with a yard and sufficient funding could build useful destroyers or sloops; major-warship construction was much more restricted.

A country did not need a dreadnought-capable industrial base to construct a useful naval vessel in either 1910 or 1935. Any nation with a competent yard and adequate funding could attempt a destroyer or sloop. Ships of those types remained under roughly 2,000 tons in the period and could still perform valuable fleet, escort, or patrol work. Major warships demanded a much narrower combination of heavy industry, specialist design, armor, weapons, and finance. Usefulness depends on mission rather than capital-ship prestige.