antique vintage bakery kitchen bread loaf baking pans for huge oven

Lot of ten very old steel 'trays' of four loaf pans each, to rise and bake 40 loaves of bread. Each tray is made as one piece, the individual pans are not detachable or removable from the frames, which makes them easy to carry and move about in the oven, but makes the pans nearly impossible to clean, as you can see from the photos!

We'd guess that the soot and grease build up on the pans was probably the reason these were removed from service, as we didn't see any other condition problems. These are commercial / industrial quality, marked Chicago Metallic, very heavy steel.

Each tray rack measures 21 3/4" x 11" overall, with individual pans sized 10 1/2" x 4 1/2" x 3".