My dad gave me a Marlin Model 99 and I was trying to do some research on it but couldn't realy find anything. There is no serial # so it has to be pre 1968. There is no letter after the 99 to indicate its a "c" or "dl" model. It has a gold plated trigger, a white spacer between the butt plate and stock, and it is micro-grooved. Does anybody know anything about this model?