I thought so, either that, or they were some really ancient ones. The do make excellent clamps, and are impervious to glues, pain, and the like!
This final picture looks good. Have seen you do some amazing work. Keep it up.
I don't know if you or anyone else is familiar with the website Shorpy but it's a great site. It has plenty of vintage pictures, most in very high resolution. While I was on there today I saw this and it looks similar to your station Bill: http://www.shorpy.com/node/13894?size=_original#caption Check out the rest of the site and tags under "railroads".