KY Jon,
I have not found much mention of the Model 60. The Model 50 is listed in the 1912 Union Arms Co. catalog.




The Model 60 appears to be the same design as the Model 50 but a high grade. All examples I have noted are 20ga guns.







I am finding an inconsistency with the numbers stamps on the bottom of some models as being the model number. All model 24 pump guns I have witnessed have the "2-4" stamp. Recently I have found both double guns and this Model 60 with the same "2-4" or "2-5". Do any of you have a grasp on what these numbers actually represent?

John