Pella Storm Door White with Nickel (silver) handles
A handy person from Chesapeake, VA says:
July 24, 2017
Need to replace the interior mechanism of the door handle as in image 1&2.
The number stamped on the faulty mechanism is 05 07 21. Here are the other numbers found on the storm door itself. 021306 90561 1043
Is this part still available?
Tom from SWISCO responded:
July 28, 2017
It looks like you have our 40-191 Pella multi-point mortise lock. Carefully go over the dimensions before you make a purchase, however. Thanks for choosing SWISCO.