1950s M lenses - All with "click stops" aperture rings?

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BNF

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I have a new to me 4/90 Elmar M (c1957).


The aperture ring is tight enough to change the focus when closing down, but not when opening up. The focusing ring/helical feel like new and are not too loose or too tight.

My 90 was just CLAd by a professional Leica shop, and is otherwise, near mint.

Is this reasonable (for a CLAd lens)?
 
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