Sniper,
If you look closely, you will see that the above Security-Six is not a lowback because the grips are the newer highback type. The lowback grips are shaped dfferently-especially noticeable at the top-and they are wider at the base of the grips(As viewed from the side)as well as having a little tail at the bottom rear of the grips, that turn out slightly towards the rear. Also, the slope of the frame just below the hammer doesn't slope down as much as a lowback does and the upper rear of the frame that the web of your hand fits against is much more vertical-whereas, the lowback slopes towards the front of the gun. All of this is easy to forget-if it has been awhile since comparing your lowback Sixes with your newer, highback's! I know-because I'm guilty of forgetting this myself-since all of my lowback's are buried in the rear of my safe due to being more collectible!Sniper,
Save up your money for the revolver you want. That Security Six is a keeper! I have several and I enjoy them all!
But tell me, it looks awfuly like a low back you have there. Check that prefix. If it's a 150- then it's a low back and worth even more (I have two of 'em myself!)
Deaf