the "internal" door lock mechanism measures 8 1/2" long, 1 9/16"depth, mounting holes are 7 1/4" apart.
The Pella Door Serial Number is - 09 2606 4601 1289
The lock mechanism has a date stamped 05 10 06.
Thank you.
Mark
Dave Sr. from SWISCO responded:
March 30, 2015
I would start by looking at our 40-191 Pella mortise latch. Could this be what you're looking for? If not, please send us a photo of your existing lock and we can try to identify a match for you.