Has anyone ever seen/used this lens - Dallmeyer Dallon 14" f/3.5

[vssoutlet]

Hi,

Has anyone ever seen/used this lens - Dallmeyer Dallon 14" f/3.5? I've seen several of the slower f5/6 versions, but none at all at this speed. It is in their records, however as "f3.5/14-inch 'Ultra-Speed Dallon Lens." Not looking for a value - just for any knowledge out there. Some pics are below:

Thanks!

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[Dan Fromm]

The VM says it is for 4x5, has 7" back focus.

[vssoutlet]

the vm says it is for 4x5, has 7" back focus.

vm?

[pjd]

vm?

Vade Mecum, an interesting source of information:

http://www.antiquecameras.net/lensvademecum.html