Internal Lock Mechanism for a screen door

A quick learner says:
Please can you help identify this.Unknown maker or brand of door requires new lock see picture attached. No name or markings on door or lock
User submitted photos of a mortise lock.
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Tom from SWISCO responded:
I am afraid we do not carry the internal mortise latch by itself that is compatible to your sizes. However, we may be able to recommend something for you that could work. Please take a look at our 40-211 handle set. Carefully compare your measurements to ours and let us know if this could work for you.
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