Vintage 1950s Shure Brothers Model 533SA Or B ? Microphone W/ Switchcraft Cable

I’m not sure which model it is because it is missing the label but it’s one of the two models . I did test it and it is working, but the button sticks a little bit and probably needs to be oiled or just used a bit more. Overall the microphone is in pretty good condition for its age with minor wear.

Please look at the pictures to see the condition and what you will receive

Thank you for looking