I've got an Olds Super tenor. It arrived from Japan in a bit of a state and Griff refurbished it - I have some photos somewhere.
It's an unusual looking horn and plays well with a big and beefy sound, which is particularly strong up high. I'm not sure what model of Martin it was based on, maybe an early Committee from the war years.
That story about a wartime shipment sunk in the Med has all the hallmarks of an urban myth. I read it on SOTW and think it is nonsense.