Here is mine - seen here many times. Frame is a 1"x1" brass bar, machined to look like Lobaugh. Drivers are Lobaugh. Tender trucks were cast by my Dad in the Tucson city foundry - nickel silver. I have not found it in me to paint them. Vince Waterman later used my master for 1/4" scale bronze sideframes. Boiler is 1/16' thick copper, silver soldered with the 1100 degree stuff. Striping is by Pilot pen.
This model is a 17/64 scale GS-2. I should mention that the tender underframe mimics the ones used by Lobaugh for the Berkshire, Pacific, and Cab Forward. I did not cast it; rather, it is soldered together bar stock. But still, it looks like a smoothed-up Berkshire frame.