Interlocking Door Handle

A home owner from Chicago, IL says:
Hello -
The door handle on our door snapped off today (we live in Chicago and it's freezing - literally - and it's an old door). It's interlocking, which I understand isn't made anymore, but I can't find the brand of it on the door because, well, the handle broke off.
I'm hoping that I can just get a replacement handle set, but I don't know which one I can get. Please help!
User submitted photos of a door handle set
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I can't make out the type of locking handle you have on your door, however take a look at the 40-184 replacement lever handle and see if you can use this on your door.
How to install the Swisco 40-049 Mortise lock set.
How to install the Swisco 40-049 Mortise lock set.
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