I have a Buck knife I have not been able to identify. It is a pre-73 I guess because there is no model, number, just buck, (fancy letters) over USA. To describe it best with no pic would be to say it looks almost just like my Scout 107, except it is over 3 inches longer, at 10 1/4". Both have nearly identical shapes and proportions with dark mycarta handles, 3 aluminum pins, and aluminum guard/trim. Unfortunately there is no sheath that might of had a model number at least. Does anyone know what model this is or have any info on it? Also, what is a good reference book out there on collectable Buck knives.