Alex,
I finally had a chance to look at what I have and there is 1 water temp and 1 oil temp gauge. The bezel is the same on both and looks like an inverted V. I also have a Smiths Jaeger Fuel gauge that has a bezel that is straighjt up on the outside and then slopes inward to the glass. From your description I think the temp gauges have the bezel you are looking for and if you agree by description, I'll take a picture for you so you can confirm.
Jay