They are, in my view, generally underrated and undervalued in the vintage collector communities. They made excellent watches through the '50s, often featuring really attractive dials, and housed in particularly good screw-back cases (much better than average). However, as they tended to be small by today's standards (i.e. 28-34mm), their values are generally relatively low outside of Asia (where there is strong demand).
There are also notable exceptions, such as the Multicenterchrono model. Here are a few of mine.
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