Randall occasionally pinned a butt if the threaded tang was damaged or too short to fit a nut. Capt. is correct that it was common for Tom L. to pin butts, particularly on smaller knives. I have had several. Capt. is also correct than many of these knives were not marked by Tom.

As for spacers, LB's were no different than any other standard model. For those looking:

http://store01.prostores.com/servlet/sharpinvestments/the-728/Randall-Knife-Model-%23/Detail