Thank you for the excellent information. Attached are more pictures of this SV Prefix find. From what can be seen, is the hole underneath cylinder latch and sideplate "S" pretty standard features? Also, I'm not seeing a plug where lanyard hole should be. Based on serial number ranges posted, would the production number be around 40,000 on the SV's? Through additional Forum searches I've learned more about the SV Prefix revolvers since yesterday's post. The treasure-hunt and research on Smith's is fantastic and this Forum and knowledge available is endless. I found the following in-depth link to be helpful in my search.
The Postwar Commercial Victory Model