I very much doubt that this is a Model 33. Google image search for 'model 33' returns results such as this. The most significant difference is that Google results show a teletype which has a flat keyboard, whereas this one has a circular keyboard. So if someone can confirm that this is indeed not model 33, someone can correct the image.
Also, the image uses the wrong name "ASR-33" as opposed to the correct one, "Model 33 ASR".