There are two handles in between windows.

A home owner from Tampa Florida says:
February 9, 2022
You lift the handle then the lock is release and window can be open by twisting handle in bottom of window. There are letters D H with words del mar on side with made in Canada edged into outside portion of window.
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Casey from SWISCO responded:
February 10, 2022

Hello,

Take a look and compare the specifications shown on the 38-090 product page to your locking handle. Thanks for posting! 
SilverLine Casement Locking Handle
SilverLine Casement Locking Handle
38-090
$3.92
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