Though this post is not technically on vintage Model 14 topics, the above discussion generated the following idea...so...
Usually one is wrong if he says "never" about Randall knife variants. However, I have never seen or heard of a Model-2 with teeth...ever. So, I am considering sending a circa 1973 knife to the shop and have them modify it like this...
Or...maybe not...
Just to report - I checked the electronic copies of catalogs. The 17th (1965) does not seem to list teeth as an option on Model 14s, and it only mentions teeth for the Model 18.. My reference partial catalog does not mention "cutting helicopter skin."
However, the 16th printing (1964) has an extensive section introducing the Model 18 with teeth and includes a quote from Major Ingraham saying it would cut through the skin of a helicopter.
My brother must have used the 1964 catalog, and requested teeth on a Orlando-made Model 14. Memories can be tricky. He was right about the quote, wrong about the option model.