I had the opportunity to try this one on some months ago. It was a very substantial piece. I found the dial with the various guilloches and treatments quite attractive.
I’m less familiar with the Kalpa…but I am going to rectify that🤓 …Now it will be some choice between this and the Hebdomaire especially since I have found out that one of my relatives is a high end watch dealer…Ruh Roh!!!!!