old d-series lock

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The new Falcon T-Series latch, introduced mid-June 2013, will work with all available T lock strike options.  No changes have been made to the strikes.
No parts are compatible between the Falcon MA-Series and the obsolete Falcon M-Series.
The Locknetics 9100 series electric strikes are replaced with Von Duprin 6211 and 6210 electric strikes.   The 6211 is used if the frame is being replaced. The 6210 is for ...
Falcon is reintroducing the lever return spring for the discontinued Falcon M mortise series.  Effective November 1, 2014 the lever return spring is now available for purchase with a list pric...
The old D series lever lock was replaced by the ND lock in September 2003.
Only the lever return spring is available.
Related solution: What is the part number for the lever return spring for the old M series mortise lock?
Falcon replaced its deadbolt offering in 2008 with the D100 and D200 series.  The D800 Grade 2 deadbolt was replaced by the D200 and the D400 Grade 1 deadbolt was replaced by the D100.   The new bo...
  Part compatibility (Old vs new): With the exception of the cylinder, most of the parts are neither backward nor forward compatible.  This includes the deadbolt. The cylinder mechanism for al...
The L Series lock can fit into a door prepped for the SCHLAGE K Series with some additional prep as described here.  
K and L trim and parts are not interchangeable.