I must apologize for expressing a opinion that is WRONG. My first post above is incorrect. Now I have sought out knowledge and found the truth.
Dating a 307.......Yes, you can date 307s to two era's. Those with knife, bolt and hammer shield and those with BUCK shields. But actual year dates you can only date to the BUCK shields to 86,87,88 and early 89. All Knife, Bolt and Hammer shields you cannot attach to any particular year.
I have talked today to Phil Gibbs formerly of Camillus Knives, Joe Houser of Buck Knives and Leroy Remer former knife craftsman for Buck knives. All of their memories followed the same path. Camillus received from Buck the BUCK metal sticky back shields in a roll. They would apply them to a indention in the scale. The sticky back shields would then attach themselves to the 307's Delrin scale. The knife, bolt and hammer shields were hot pressed into their indentation during production.
So. yes the Buck shield 307s were made during 86,87,88 and early 89. Others had Knife, Bolt and Hammer shields. They all also felt that all Camillus production for those years should have BUCK shields BUT if so where the heck are they. Other than 307s I have only seen one 321 with a BUCK shield. ? Remember, Buck had taken over production of the 301,303,309 and 305. You would think there would be the same number of other models with BUCK shields.
300Bucks