Hi and welcome, Crisco

It's always nice to see a new poster with an old Randall, especially one with a sense of humor. I put it ~ mid '46 (when translucents started) through the end of '47(when translucents and 5 1/2" Model 3's were discontinued). I'm thinking $2K give or take on e-bay because the condition leaves quite a bit to be desired. Your mileage may vary because you use Imperial gallons.

Are there any markings on the other knife?

Best