I can’t find the model number

[AllenMac]

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Please help. I cant find the model number of Summicron 35mm with serial number 458xxxx . 

[adan]

The catalog number should be engraved, but unpainted (and thus sometimes hard to see - it will be black-on-black or silver-on-silver) -

and on the base ring (i.e. the ring that carries the large yellow or red "35/35" and DoF scale) -

and on the bottom of that ring when mounted (i.e. opposite the focus and aperture index marks)

APO-Summicron-M-ASPH should be 11699

The non-APO Summicron-M ASPH has had many different numbers over its life:

 - 11879-black - 11882-silver - 11608-silver (S) - 11609-titan - 11611-black - 11616-LHSAchrom - 11696-gray - 11619-chrome (S) . LLC - 155

[AllenMac]

I still can’t find it. ☹️

5 hours ago, adan said:

The catalog number should be engraved, but unpainted (and thus sometimes hard to see - it will be black-on-black or silver-on-silver) -

and on the base ring (i.e. the ring that carries the large yellow or red "35/35" and DoF scale) -

and on the bottom of that ring when mounted (i.e. opposite the focus and aperture index marks)

APO-Summicron-M-ASPH should be 11699

The non-APO Summicron-M ASPH has had many different numbers over its life:

 - 11879-black - 11882-silver - 11608-silver (S) - 11609-titan - 11611-black - 11616-LHSAchrom - 11696-gray - 11619-chrome (S) . LLC - 155

Thank you Adan! I will check for this.

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[luigi bertolotti]

My one, chrome - asph - 3996721 also does not have the code engraved ; "LENS MADE IN GERMANY" in exactly the same position as yours.

[adan]

Intriguing. Although Leica hs been known for - inconsistencies - in engravings.

Here is a "Made-in-Portugal" 35 f/2 ASPH (i.e. from around 2020±) - that includes the catalog number (maybe only for the Portugese lenses) of 11708.

Click the lens image to cycle through views until the engraving is visible.

https://www.mpb.com/en-uk/product/leica-35mm-f2-summicron-m-asph-11708-made-in-portugal