Your family had good taste Jim
There is a great deal of information on the Home Page under 'Shotguns' and 'FAQ'
https://lcsca.clubexpress.com/

If the SN is 164554 it is a 'F' (lowest) grade made prior to WWI



Utility grade hammerless and hammer guns were ordered in bulk by hardware and sporting goods stores and it is unlikely that a Research Letter would document to where the gun was originally shipped. A Letter might do so if your other guns are higher grade or post-WWI, and possibly the original purchaser.

The barrels should be Royal Steel and would be so marked just forward of the flats



The gun should of course be evaluated by a double gun specialist before use. The smith could verify the gauge and the choke constrictions.