mortise lock with offset knobs

[joefries]

I am trying to find a mortise lock that uses a pair of large brass knobs mounted in the center of the exterior panels of a set of French doors.
There are smaller knobs of the same design closer to the edge of the door on the interior panels. The mortise lock is removed, but I can deduce it's design from the remaining knobs.

So the interior and exterior knobs have separate spindles, several inches apart, but at the same height, and they are held in the door by a brass washer that is visible on the opposite face of the door.

Has anyone seen or heard of a mortise lock of this type?

[Pschiffe]

Seems unlikely that the interior and exterior knobs would have separate spindles. Perhaps the hole you observed on the interior was for a turn knob to lock the door. I'm confused by your use of the terms "exterior panels" and "interior panels". French doors usually have multiple panes of glass separated by muntin bars, the vertical elements at the edges of the door are called stiles. "Panels" are generally found indoors that have no glass! See image attached:

Pete Schifferli

[Pschiffe]

Seems unlikely that the interior and exterior knobs would have separate spindles. Perhaps the hole you observed on the interior was for a turn knob to lock the door. I'm confused by your use of the terms "exterior panels" and "interior panels". French doors usually have multiple panes of glass separated by muntin bars, the vertical elements at the edges of the door are called stiles. "Panels" are generally found indoors that have no glass! See image attached:

Pete Schifferli

[Tom Gordon]

One explanation may be that the handles were mucked about somewhat but originally had a large handle both internally and externally to operate the sprung latch within the mortice lock. Additionally there was a small handle on the inside which operated a bolt within the mortice lock. Sometimes they additionally had a key too.
How old are the doors?

[Dean Nickel]

Pictures are going to be the only help on this one.