The market does value the older WWII era HSCs over the ones made in the late 60s early 70s but not regardless of one being refinished. Collectors want ones in original condition. Some non factory use markings increase value, like German Naval markings and others hurt value, like a GI replacing the grips with aircraft plexiglass or carving their initials into the grips or having one chrome plated. Collectors also value condition and prefer examples that were well taken care of loss of original finish is a major factor in consideration of value. So even if yours was refinished with the original type blue finish it is no longer the original and a knowing eye can tell.
Regards,
