I love that site, but it always drives me crazy because, according to the info on it, my King tenor does not exist!
The serial # is c-43xxx, which I guess should mean it's a Cleveland 615 from around 1941. However, the whole configuration is different. For example, it doesn't have split bell keys and the neck (with matching ser#) is a Zephyr neck without the double socket.
I'm wondering if the C in the serial doesn't mean the "Cleveland" brand, but rather that it was made specially for the US Marines?
Whatever it is, it's a kick-a** tenor!