Big Ben Chime Westclox Alarm RD 1931 Western Clock Peterborough

I've aquired this 1931 Westclox Alarm clock just over a year or so ago from a friend & co-worker who inherited an older home from an older lady who had passed away. I loved the look of this old clock. I do not know much about this clock but found it interesting and have not seen one like this before. Not sure if these are common but I would love to know more about it in terms of rarity & worth. Marking just under the alarm dial shows Chime Alarm and Westclox Big Ben shows on the lower part of the Dial. There is also a number 69 at the bottom of the base.