Anyone recognise this Goerz 120mm Double Anastigmat?

[pkrpkr]

Here's another one I can't identify (yet). It's a Goerz Doppel Anastigmat Series III/0 F=120mm, serial no. 108507.
It doesn't look like the DA's Series III/0 I found so far and the F-stops are 4,6-6-12-24-48-96-192.
There is a slot and internally there is nothing pointing towards a perhaps missing iris diaphragm.
Anyone have a clue?
Thanks in advance,
Peter

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[Dan Fromm]

Goerz Doppel Anastigmat Ser. III = Dagor.

Look up Stölze aperture scale.

[Andrew Plume]

AND fwiw I have one here, it's mounted into one of those B & L Automat Shutters

regards

Andrew

[Andrew Plume]

The aperture scales are 'the old European scales' - my understanding is that the Dagor's were pretty well f6.8 and then f7.7 for the larger FL's but Dan is a better resource than me

rgds

Andrew

[pkrpkr]

Thanks Andrew & Dan! Also found Dan's onedrive info - great resource!