Thank you for your feedback. I welcome any information and both resopnses I have received to my post have helped answer my question. Of course pitting would be expected on vintage timepieces especially those made from stainless steel. However, I have seen vintage pieces that do not have any pitting which are offered for sale from reputable websites. For example my father's tiempiece from the late 1950's (whose brand I will refrain from mentioning) has no pitting at all and I am sure he never had any treatments done to his case ever since he had it from new. I checked under the seal and it was flawless on both the case back, case and between the lugs. Which is why I raised the question as a newbie to the timepiece collection if this bothered collectors. I will lecture metallurgy on this forum as I purely mentioned it to support my enquiry. However I am aware that the cases can be laser welded which I know is also expensive, hence compromising the value of the timepiece as responded to me to this thread prior to yours. Which of course is a turn off for me if I need to spend more money for a timepiece needing extra work which can be avoided on a similar timepiece without this problem ( in the same mechanical condition) for the same price. This would hardly be crying fire in a crowded theatre. Thank you for your response as it was very helpful.