For your consideration, I have a Vintage Lux Ornate Floral Wall Cuckoo Clock Waterbury Conn w/Key.  This is not working.  It is 6" from top to bottom and 4-1/4" wide.  The key isn't original but it works fine.  This comes from a smoke free home.  I will be listing several vintage items so check out my other listings as I will combine shipping on multiple sales.