Daisy made a model Golden Eagle BB rifle but it was a model 104 golden Eagle from 1966-1974. Daisy made a model 88 Hunter rifle, roughly from 1957 - 1960 Daisy made a model 98 Daisy Eagle in three variations from 1955 -1960. (I think this is the rifle you are referring to.)
To start with which model of Daisy are you talking about. Daisy has been making various model air rifles for over 100 years. Too many to list here. I suggest you ask this question to Daisy Directly. See the link below.
After considerable research I can find NO information on a Daisy Model 198. Are you sure that it's not a model 1938. I suggest you contact Daisy directly. They offer a free service to give you more information about your old Daisy. "See the link below."