Leica "M" 90mm f/2 Summicron: RARE limited production model, Pre-Asph E49.

Early production model 1980 lens, it's the Pre-Asph optical design with an E49 filter ring (lenses from c.1982 were E55). This is a rarely seen "early production example" of the Leica 90mm f/2 Summicron M introduced in 1980.

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