Photos: Search all photos captured by a particular device (iPhone 5s)
I am not used to the Photos App, so this might not be the best solution but could solve your question.


In the menubar go to File and then click on New Smart Album...
Select Camera Model from the first drop-down menu and then pick the rest to fit your needs.




To find out what exactly you need to type there, you can just get the info of a picture where you know that you took it with that device and see what exactly it says. 

Edit: As it turns out, my old iPhone 5s says "Apple iPhone 5s" but this Smart Album only worked if I wrote contains "iPhone 5s", so that should work.