Identifying Leica Lenses

[BrendaM]

Hi! I've received these two lenses but do not understand how to properly identify them. They are both vintage Leica lenses, but not sure how to properly identify/label them. Any assistance would be greatly appreciated!

 

[snowbear]

Looks like 90mm (9cm = 90mm), f/4 and 50mm f/2.

 

[gk fotografie]

Hi! I've received these two lenses but do not understand how to properly identify them. They are both vintage Leica lenses, but not sure how to properly identify/label them. Any assistance would be greatly appreciated!View attachment 277489View attachment 277490View attachment 277491View attachment 277492View attachment 277493View attachment 277494View attachment 277495

Just look at the links below, do not rely too much on the sales prices mentioned, these are old lenses and the value is very dependent on the condition, including whether the glass is not scratched or whether there is dust or mold, etc.
There is still a demand for these types of Leica lenses, despite their age.
Leica lenses: 90mm 50mm