I just replaced D429-619 stamped Lever with 42-006 Mortise Flush Lever. It was a perfect fit and did not require any alterations. The product arrived on time and I am a happy customer.
Tom from SWISCO responded:
October 19, 2016
Thank you for letting us know the 42-006 worked! I'm sure this will help other customers in the future. Please let us know if we can be of any further help.