Personally, if a razor is in decent shape and everything works (fairly well) I tend to leave them original, especially old Sheffields. Sometimes a little cleaning around the pivot pin with Scrubbing Bubbles and dental floss then a drop of very light oil can help smooth things out. Now, if the scales are in bad shape (bent, bug bites, etc.) and pivot action isn't that good but the blade is in really good condition it sounds like a great candidate for a custom restore/rescale and something you would treasure for years to come.