Here is that new guy around wristwatches asking an elementary question: If you have a wristwatch, how do you research what it is? I know that it is an Elgin (it says so on the face and on the back). Now, how do I find the model and the estimated date of manufacturing? Once I open the case, how do I know what movement number it is? I am envious of those that know the make model and movement of the watches they wear. Thank you for your kind guidance.