Dagor - Help with Serial and Date

[sharpnikkor]

I also have what appears to be a pre WWII GoerZ Am. Optical Dagor, that is coated. The inscription on mine reads Goerz Dagor, F:6.8, Focus 12 in., No. 397XXX. Mine is in an early Acme shutter. Any idea when this lens was made? There is a big gap in the listed Goerz serial numbers between 320000 (1918) and 751240 (1927). And if Burke & James were coating older Goerz Dagors. How would they have done the actual coating? Coated the existing cells as they were, or de-cemented the cells, coated the outside elements and re-cemented the three elements in each cell?

Scott

[Thorney]

Thanks again - Kerry and gang!
So maybe it is older than I thought after all.
Someone found it worthy of a new shutter and a coating along the way.

BTW: I love that alphax shutter which is amazingly only 1/3 stop slow for 1/100th and for 1 second - and 1/5 stop or less slow for the other speeds.

Thorney