two serial numbers on my 50mm Summicron???

[cjm]

I have a type 2 black rigid 50mm Summicron and the serial number on front of the barrel is 2270218. I just noticed that if I focus as close as possible, the barrel extends and reveals another number etched in the side of the barrel. That number is 2796221. Any idea what this second number is?

 

[ben lloyd]

Can you post a picture of it?

My first thought is it might be someone's social security number, or an inventory number for a business.

 

[venchka]

Not enough numbers for Social Security. Drivers licenses maybe. OR, you have a lens head and focusing mount mis-match. Does the lens head unscrew from the mount? DR Summicrons have a lens head which unscrews from the focusing mount. Both pieces left the factory with the same serial number. That assures that the lens and mount match.

 

[cjm]

The number is on the apeture ring.

 

[trittium]

looks like a phone number

 

[Magus]

Post deleted by posters request

 

[venchka]

Ah yes. A picture is worth a thousand words. That would be what KEH calls "engraved". I did the same thing to my very nice Canon SLR gear back in the '70s. Dumb! It doesn't hurt the pictures for sure!

 

[cjm]

Thanks everyone.

 

[jgeenen]

The numbers are etched using US style hand writing. Germans typically use different styles especially for "1" and "7". So it is not a factory or (German) service engraving.