Hi Reverened Bob
As you have noted, I have found this watch in a number of Ambassadors on eBay. I went there looking to see if I could find this case anywhere, and pretty much struck out on anything with a similar works/case configuration. It was sold to me as an Ambassador, but from what I have seen they all are signed Ambassador on the dial. The movement is M8 and the case back is N2, so I think I was hoodwinked again. Gonna keep it though, as I am fond of the micro-rotors, and will take some time and find out what is the right case for this dial/movement eventually. If you are aware of what movement belongs in this case I would appreciate it.
I was aware of the chrono module on the periphery of my knowledge. You have resparked my interest in it. I have also seen this movement in a Universal Geneve Polerouter. Besides the chrono, they probably do the best decoration to the works. After I finally obtain a proper Ambassador, I will likely be on the hunt for the Polerouter.
Thanx for your depth of knowledge, it helps to be steered in the right direction