Sorry for your loss.
Those are amazing mementos to remember your father by.
Not all watches have model names.
The Patek Philippe will have a reference number I suspect but you’d need to get it opened to see the engravings inside to figure it out.
Just looking at the designs, the Patek Philippe with salmon dial looks to be from the late 1940s, the very pure and plain Jaeger Le Coultre, also beautiful appears to be from the early 1950s, and the Memovox also from the 1950s.
No matter what you do with them you must absolutely ensure that you let no one touch them, open them or service them except a professional watchmaker that comes recommended affer doing serious due diligence.
Jewelers are not professional watch makers, they can do irreversible damage to a watch by scratching the case back in ways that cannot be repaired- and they also can ship watches to the wrong watchmaker.
Whatever you do, you must proceed with extreme caution considering the value, both sentimental and monetary.