The 60-1 2" target was an Ashland Shooters Supply distributor exclusive. There were 660 made. I have one. It's just like the above pictures.
I was lucky to find a new old stock barrel for one (the front sight height is unique to that barrel), and a Model 60-14 target with issues. I had the 60-1 barrel installed on the 60-14, fixed the issues, and removed the internal lock. The barrel is marked .38 Special of course, but he Model 60-14 is a .357. It's a handful!
They made a 60-4 3" target .38spl and a 60-10 3" target in .357. I have those as well.