need to find humminbird depth finder model number

[tadams7]

I have a Humminbird depth finder that is not working. I'm trying to find an identical replacement, but I don't know what the model number is on the one I have. There are two numbers on the housing, 400119-2 is molded into the back of the housing, and WP60ID1620277 is stamped on a plate on the back of the housing. I've searched the Humminbird website and Google, with no results. I've attached a couple of pictures, can anyone help me identify this depth finder? Another option would be to find a newer depth finder, with air and water temp, but it needs to fit into the 3 1/2 inch hole this one left.