[drh4683]

Nice work, glad to see you chose the USA made sprague caps. You did it right!

I also notice the stamp under the chassis, United States Steel "USS". I always like when I get a set that has a chassis or cabinet steel stamping that happens to include the stamp from the steel maker. Its all on probability as the stamp is placed on the steel stock every few feet when its wound into the roll. You get lucky every now and then and get one like yours. Looks like the steel on yours came from Irvin works, which is in PA. That plant is still in operation too. Sometimes, you'll see the month-year code on the stamp, but looks like that is missing due to the punch outs on the chassis.