I just found out the the Cartier caliber 81 was made by Ebel so I do not know if there would be an equivalent ETA replacement. As for my daughter-in-law, she has NO idea of movements or watches in general. Just something I thought would be nice and something I could share with her as watches are my thing. Hey, I even got my better half to get into watches as well by buying her some nice pieces. Now she even commandeers some of my pieces as well.