The logo jumps from side to side all the time. Though there does seem to be a pattern with certain frame sizes and models in certain eras. If I had to guess, I'd say since the early '80's you'd find the logo on the left side about 80% of the time, and on the right about 20%.
Performance center guns always have the pc logo on the left. So, their S&W logo has to be on the right (if there is one). From time to time I also see Smiths with the S&W logo on BOTH sides, and more far more frequently -- NO logo on either side.
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~ S&W aficionado in training ~
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