(LOVE your Avatar!! Is that from the masque house in NO LA??)) I am a 77 year old Mom who loves Chanel #5 but am not familiar with the house you mention.
From the more 'traditional' houses I love also Shalimar, Jardin de Bagatelles, Champs Elysees
But suggestions have been made here on similar threads that you try getting samples of several frags you think your Mom might like, together with a gift certificate from the store from which they are available. My kids gave me an Amazon gift certificate this Christmas and I was able to indulge in Eau des Merveilles at a discounted price this way!!