Mystery Goerz lens?

[koh303]

196065
196066

From the rear, you can tell these is a Goerz lens with a styled SN inscribed on the rear cell barrel.
The front has no markings, but eyballing it, lens glass appears to be symmetrical.
Looks like custom job by Grimes, but no reference to the front cell barrel of any kind.
Effective max aperture is greater than F9 (which is what the scale is custom marked for).

The focal length is around 70-80mm, perhaps somewhere in the middle.
Coverage is around 4X5, though corners are quite dim.

Does anyone have an idea of what this is?
A W.A. Dagor? Something else?

Thanks

[Jim Noel]

Itis not a WA Dagor. The 75mm WA Dgo is well identified on it.

[koh303]

Should have noted, it is clear the glass has been recelled, probably to fit this shutter application, and most likely lost its faceplate or other markings in the process...

[Mark Sawyer]

You may have to remove the glass from the mount to see what the construction is. I'd guess a WA Dagor with the identifying markings gone, but who knows...

[Luis-F-S]

Did you count the reflections on the glass? L

[Jim Noel]

You may have to remove the glass from the mount to see what the construction is. I'd guess a WA Dagor with the identifying markings gone, but who knows...

The identifying info is around the flat part of the rim of the front element.

[koh303]

Glass edges are under 0.5mm thick, and no writing is observed there.
The construction is 4 elements in 4 groups.

[Dan Fromm]

Then it isn't a Dagor. Artar or Gotar, if a Goerz American lens.

[arri]

It looks similar to a Mamiya 65mm f/6.3 lens. It is a 4/4 lens as well.
The coverage of the lens is larger than the 100mm you need for this format but the edges are very dark and not realy sharp when you use it for larger sizes.
Rodenstock made a 4/4 lenses design too but it were a 90mm f/8 lens and the serial # is not high enough for it.

The kind of writing the "1" as "I" is an English or American style.
Typical 4/4 designs are the Wray Wide angle 6.8/89mm and the Kodak Wide Field Ektar
Here I´am sure it is a Goerz WA design which follows the air spaced lens design of the other lens makers.
This kind of lenses were made for a lot of decades.
Hugo Meyer made the Wideangle Aristostigmat since the 1930th.
From Leitmyer in Munich a f/6.8 and as a prototype a f/5.5 90mm lens is known, started in the 1930th too.
The Zeiss Topogon is a 4/4 lens.
My favorite of all lenses in this design is the Rodenstock Geronar WA 90mm f/8

[koh303]

Grimes just confirmed, this is a Rectagon 3" F6.
Will be listing for sale soon.