Replace with 49902-1635T-03-Kit
Replacement includes bottom gear, top extension and stainless steel screws.

Fuhr 3-point, Automatic multipoint lock; Tongue Version 

Please Review all 3 Images for details.
Automatic Locking: Tongue Version - Tongues engage when door closes
Backset: 1-3/8 inches (35mm),
Deadbolt Throw: 1/2 inch (14mm),
Handle to Cylinder spacing (PZ): 3-5/8 inches (92mm),
Handle Height: 36 inches (914mm)
Bottom Tongue position 29.65 inches (753mm)
Top Tongue position 29.25 inches ( 743mm) 
Overall Length fits Doors 71.06 to 78.74 inches tall.
Note: this Multi-Point lock can be trimmed for different height doors
Used by Semco and other door companies

NOTE: The Automatic has the Roller located in a different position than on the replacement
We suggest changing to the manual version - If automatic is desired, contact office.

Fuhr Replacement Option: 49902-1635T-03-Kit
This is a replacement made by HOPPE
Includes gearbox, upper and lower tongue locks and screws.
Reuse your trim, handles and keyed cylinder.