I examined a couple of High Standard .22 autos circa 1970s or 80s today. I noticed the front and rear straps of the frame were stippled on both. I cannot recall seeing this before but it has been some time since I have handled a High Standard .22 auto. Was this a standard feature or something some added to these pistols? As well, one of the pistols has silver fittings and not the gold fittings you see on most of these. Was that an option or did the gold plating fade?