The station model number should be on a sticker on the front of the metal frame. Open the front cover with a B key and you should see it. The drawing below seems to fit your description. The drawing is an addressable station.
The station model number should be on a sticker on the front of the metal frame. Open the front cover with a B key and you should see it. The drawing below seems to fit your description. The drawing is an addressable station.