Congratulations on your first watch repair!! I am sure there will be many more to come….
After further consideration….I am not sure what you have….We need a picture. But I am leaving what I first wrote, just in case this is what it is…..
Without a picture it is hard to say, but from your description, this sounds like a hunter case.
The hunter case and hunter movement are designed so that the lid opens sideways revealing the watch to be read without turning the watch in your hand. I hope this makes sense, as I am typing it seems hard to describe without seeing it…Here, a picture is worth a thousand words:
In the picture the watch is displaying a time of three o’clock. I hope this helps!!