Attachment 196065
Attachment 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