This is a classic model used in the USA and Canada and the model No is 500 series and dated from 1949. This one would be dated around the late 1960s. This is a very nice model and can be seen in hundreds of American films. This model has a beautiful ring tone and you will best remember this from the Rockford files at the beginning of each episode. The ringer is adjustable to be loud or soft via a small wheel under the telephone. This model is so popular it is now being copied and many reproductions are being sold. This is the genuine article and I have small number for sale. Please see the pictures to see how good this telephone is. A dial label with your information can be in the GPO style at no extra cost. Please state if you would prefer the original one in this telephone.