From Frisco company photos are the birth of 4300 at the West Shops. I'm trying to figure out how to arrange the photos in the proper order but no luck, so you'll have to use your imagination. The boiler is shown prior to the smokebox being attached and the courses not riveted together or staybolts installed. It is newly fabricated from nickle steel and will have the steam dome and base from 2-10-2 No. 57 put on and riveted down. The dome has the Baldwin builder's number stamped on the front side and by doing this, the Frisco will have tax advantages by claiming it as the "old" boiler from the 57. When the 4400s came along, they actually used the Spot engine boilers.