I just ordered brass Mortise Latch 40-198 (based on measurements) Will it fit below door

A quick learner from Louisville,Ky. says:
9880 made in brazil ; desmoines iowa on side mortise latch and front of mortise block ---EMCO,madein brazil on keys. Brass clips holding glass to frame say EMCO Demoines, Iowa I thought it was a Larson (30-40 yrs old) IF I HAVE SCREWED UP I WOULD LIKE TO CANCEL MY ORDER AND ORDER SOMETHING CORRECT.... THANK YOU
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Emily from SWISCO responded:

Thank you for reaching out to us. I'm afraid I can't confirm if the part you ordered will fit your door. You would need to carefully compare our dimensions with your old lock to see how they match up. If you'd like to upload a photo of your existing lock, I'd be happy to take a look.

If you have any further questions regarding your order, I recommend contacting our customer service department at (888) 991-1929. 

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