You're right, there is very little information on Jefferson Mfg. Go. Somehow, Jefferson Arms and Kodiak Arms are tied in together. How or why, don't know. Kodiak Arms built the Model 98 and the 100 in the 1960,s based on Mauser FN actions ( later Kodiak used Sako actions ), at the same time Jefferson Mfg. was putting together rifles for Colt. I could find no listing for either in my current copy of Standard Catalog of Firearms and Kodiak's web site has no listing for firearms . de Hass, the same, no listing per say, perhaps because neither Kodiak or Jefferson built the rifles bur rather assembled them from parts. On the source of all knowledge, the internet, all I found was bits and pieces, a little bit there, a little bit here but not a whole lot anywhere, so don't know. Sorry about that.