The RSM's were made in 458 Lott, 416 Rigby and 375 H&H(rumor that a couple 404 Jeffers were made but never left the factory). RSM's also had the 3 leaf express sights. The express was the same circassian walnut stock, just different calibers and no 3 leaf express sight. Beautiful factory rifles, a little heavy in the lighter calibers.
I bought an Express in 30-06 from Freedumb1 on the classifieds here 1-2 years back. It has a similar express sight to the RSM's but with fewer blades - one fixed and one folding as I recall. They are beautiful rifles...
